DDM, how to stop layout interference?

* What PC model?
* What video card or onboard GPU?
* After you uninstalled DDM, did you run a registry cleaner to search for DDM remnants?

That is a ton of running apps...

* As a test, open the Windows 10- Control Panel- Administrative Tools- System Configuration Selective startup
* Remove the check from "Load startup items"
* Click Apply- OK
* Restart Windows 10

If the Windows 10 normal layout appears OK, then some item in the System Configuration Startup tab is the cause of your issue.
* Open the Windows 10- Control Panel- Administrative Tools- System Configuration
* Add the check back to "Load startup items"
* Click the Startup tab
* Uncheck ONE item
* Click Apply- OK
* Restart Windows 10

If the odd layout appears on restart, the item that you unchecked was not the culprit. Add that check back, uncheck a different item, restart, repeat the process until you find the culprit.

Thanks Chris, appreciate having someone else on the case. But I do think it's already clear that DDM is somehow at the root of this very recent issue, not one of my scores of other applications. So I'd like to focus on DDM first please.

I assume you want me to answer your questions here, which I'd prefer. (How would I actually send you info 'via a private message'? Is that a Twitter address? I'm not a Twitter user.)

* What PC model?
Intel Core i7 6700K (4.0GHz), 32 GB

* What video card or onboard GPU?
No additional video card; Intel HD Graphics 530. Here's a check I just made to see if there were any obvious issues with that, which I recently updated:
My Intel 530 HD status check

* After you uninstalled DDM, did you run a registry cleaner to search for DDM remnants?
Yes, I used the Advanced option of Revo Uninstaller. But see my comments about registry entries elsewhere in this reply, as I regard this area as a potential culprit.

Can you clarify a very basic question of my own please. In the course of trying to resolve this problem, I've uninstalled and reinstalled DDM several times in the last two days. Obviously something I'd like to minimise. What is the distinction between that and simply using 'Exit' to close DDM? My assumption (read 'guess'; I'm neither programmer nor techie!) is that although closing DDM leaves all or most registry entries unchanged, the screen display on reawakening the monitor should ignore DDM entirely, as I want. Is that correct? (It doesn't, of course, but neither does uninstalling!)

BTW, I assume it's not possible to avoid the 2-3 seconds delay on restarting the display, during which it displays "Input = mDP" in a small window, on top of this 'shifted top left' result, shown again here:
Initial display

My 24" iiYama displayed whatever it did before last closed, and that's really what I'd ideally like with the Dell. (Which gives me a superior display to the iiYama, BTW!)

The current status is that I have now reinstalled DDM, because with the 'uninstalled' state I have to resize and reposition windows. With DDM set to my 'compromise' layout, at leat that work is minimised.

Incidentally, although I have a 64-bit PC and chose the DDM via the Dell site, I see that it's been placed in
C:\Program Files (x86)\Dell\Dell Display Manager rather than C:\Program Files.

Another aside: when I checked the monitor settings I found the refresh was at 59 Hz, so changed it to 60 Hz.

With DDM installed, if I look at the registry key Computer\HKEY_CURRENT_USER\Software\EnTech\DDM
I see this:
DDM registry key

And I'm guessing the details about windows layouts are as shown here:
DDM 'mPositions' sub-key
DDM 'Positions' sub-key

Immediately after a U2415 restart, if I now open an app that was not open when I last used DDM's Easy Arrange, that appears at its usual size as i want. IOW. the same size it was at when last used (not while DDM was running). In contrast, if I open any window that was in one of the two 'panes' defined by DDM, that wrongly gets displayed shifted towards the top left corner with smaller sizes, as shown in my screenshots.

I'm hoping all of this will offer you or your developers some clue on how to fix ths please.

Later this morning (it's Thursday 13 September 2018, 0955 here in UK) I'll uninstall DDM yet again and repeat the registry check. They should, of course, all be gone, yes?

EDIT (doing so here, as my latest reply has not yet appeared):

Terry, East Grinstead, UK

You are looking in the wrong direction. If DDM isn't running or even installed then it is not the culprit. All DDM registry entries are in HKCU\Software\EnTech\DDM, but - again - if DDM isn't running they are meaningless.

When you did have DDM installed, you had it move and resize some windows - correct? When you disable Easy Arrange, or close DDM, or uninstall it, the windows it moved/resized do *not* get restored to their original position and size. You need to do that yourself, because many, if not most, applications will store their last size and position on closing regardless of how they got there.

Thanks, I'd hoped you'd join the discussion. But I can't square what you say with what I see.

I stepped through a typical close/re-open. The windows originally open were these:

Browser: 0,0  1441 x 1172
TextPad: 1440,0  480 x 1172
PaintShop Pro: 0,0 1920 x 1172
IrfanView, showing a JPG: 403,1  960 x 1172
Folder 'Dell...': 0,0  480 x 1172 subsequently minimised before restart
Folder 'Mono...': 0,0  480 x 1172
Folder 'Win 10...': 960,0  480 x 1172
Folder 'Downloads': 1440,0  480 x 1172

DDM was closed. All those windows had been manually arranged. Here's my screen directly before restart

And here after restart

And, as previously reported, exactly the same happened after manually restoring the windows to their correct sizes and positions. And the same even after DDM uninstalled.

Terry, East Grinstead, UK

I'll assume my earlier reply has somehow got zapped. I took no copy but here's a reconstruction.

With DDM closed I stepped through a typical 'close/reopen'.  I had eight windows open, manually arranged,  four folders plus my browser and three other apps. They had been opened and closed at various times. My screen before the U2415 close was this:
Before close

After the reopen, when the input source message closed, it was this:
After re-open

And the same after a second restart. And after yet another uninstall.

Could it be that my recently updated Intels HD Graphics 530 drivers may be the cause, despite the clean bill of health I got from the check shown in my earler reply
Intel HD Graphics report

Has anyone been able to reproduce similar behaviour please?

Meanwhile, I'll now reinstall DDM again, as that's marginally better than the uninstalled state.

I replied at length to this a couple of hours ago but it has not appeared in the thread?

>>My screen before the U2415 close was this:

>>After the reopen

What does that mean? How are you "opening" and "closing" the U2415?

With the On/Off touch button, bottom right.

Too much missing info... Use DDM to diagnose  the issue.

1. Install and run DDM

2. Go to your Easy Arrange settings and disable them by selecting the first "red X" layout button

3. Right-click on the DDM system tray icon and make sure "Auto-restore window layout" is UNchecked

4. Now arrange your windows the way you want

5. Turn off your monitor using the On/Off button

6. Wait 1 minute

7. Turn on your monitor using the On/Off button

8. Wait 1 minute

Presumably the window arrangement you created in step #4 is lost, right?

9. Right-click the DDM system tray icon, and select "Save diagnostic report", saving the file to your desktop

10. Paste the content of that diagnostic report in your reply here

I suspect that with no monitor (off, effectively disconnected), Windows and/or your display driver are resizing your open windows to fit a 1024x768 default display, but the DDM diagnostic report will bear this out.

Now: to fix this issue - or at least test a possible fix - do NOT turn your U2415 off and on again; instead use the built-in power management tools in Windows itself to put the system into standby and/or to put the monitor to sleep after so many minutes of no user activity.

---

@swamped207 wrote:

Too much missing info... Use DDM to diagnose  the issue.

1. Install and run DDM

2. Go to your Easy Arrange settings and disable them by selecting the first "red X" layout button

3. Right-click on the DDM system tray icon and make sure "Auto-restore window layout" is UNchecked

4. Now arrange your windows the way you want

5. Turn off your monitor using the On/Off button

6. Wait 1 minute

7. Turn on your monitor using the On/Off button

8. Wait 1 minute

Presumably the window arrangement you created in step #4 is lost, right?

9. Right-click the DDM system tray icon, and select "Save diagnostic report", saving the file to your desktop

10. Paste the content of that diagnostic report in your reply here

I suspect that with no monitor (off, effectively disconnected), Windows and/or your display driver are resizing your open windows to fit a 1024x768 default display, but the DDM diagnostic report will bear this out.

Now: to fix this issue - or at least test a possible fix - do NOT turn your U2415 off and on again; instead use the built-in power management tools in Windows itself to put the system into standby and/or to put the monitor to sleep after so many minutes of no user activity.

---

Correct, the visible windows had undergone their now familar shift towards the top left.

Your suspicion sounds right.

Yesterday I carefully measured the size of the top left area occupied by the re-arranged windows and got 1022 x 736, at position 2,2. 1022+2=1024 and 736+2+30 for taskbar = 768. But why would it do such an odd thing?

BTW, as mentioned up-thread one of the steps I took was to replace the Dell drivers with the generic MS version. It made no difference to the issue, and I left it like that.

Thanks for patiently staying on the case!

Here's the diagnostic report:

Diagnostic Report, generated 13/09/18 (10.0.17134)
Copyright (c) 1995-2018, EnTech Taiwan.
Version = 1.40.0.1928
OS = 10.0.17134.2 x64
Mechanism = 3
Account = Standard
Command line = "C:\Program Files (x86)\Dell\Dell Display Manager\ddm.exe"
////////////////////////////////////////
GridType = 0x00000000
GridType.DELA0B9.7MT018430UHS = 0x00000000
GridType.DELA0B9.7MT018430UHS{DB5A122C-A3B5-470C-8C46-923F6607AC34} = 0x00000000
ExtEA.1{DB5A122C-A3B5-470C-8C46-923F6607AC34} = 0x00000000
ExtEA.DELA0B9.7MT018430UHS{DB5A122C-A3B5-470C-8C46-923F6607AC34} = 0x00000000
GridType.1{DB5A122C-A3B5-470C-8C46-923F6607AC34} = 0x00000000
KbFix = 0x00000001
GlassBorder.DELA0B9.7MT018430UHS = 0x00000000
LastCheck = 0x0000A95C
HintShown = 0x00000001
AutoRestoreWindowLayout = 0x00000001
AppScan.DELA0B9.7MT018430UHS = 0x00000004
DELA0B9 = 0x00000001
FW.DELA0B9.7MT018430UHS = 0x00004201
EnumErrorCount = 0x00000000
Metro.DELA0B9.7MT018430UHS = 0x00000001
D3D.DELA0B9.7MT018430UHS = 0x00000004
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Dell\Dell Display Manager\ddm.exe = 0x00000000
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Dell\Dell Display Manager\ddm.d3d = 0x00000004
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Microsoft Office\Root\Office16\OUTLOOK.EXE = 0x00000000
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Microsoft Office\Root\Office16\WINWORD.EXE = 0x00000000
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Microsoft Office\Root\Office16\POWERPNT.EXE = 0x00000001
DELA0B9.7MT018430UHS\C:\Program Files\Waterfox\waterfox.exe = 0x00000001
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Microsoft Office\Root\Office16\EXCEL.EXE = 0x00000000
DELA0B9.7MT018430UHS\C:\Program Files\Windows NT\Accessories\WORDPAD.EXE = 0x00000000
DELA0B9.7MT018430UHS\C:\WINDOWS\system32\mspaint.exe = 0x00000001
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Windows Media Player\wmplayer.exe = 0x00000002
DELA0B9.7MT018430UHS\C:\Program Files\Internet Explorer\IEXPLORE.EXE = 0x00000001
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe = 0x00000000
DELA0B9.7MT018430UHS\C:\WINDOWS\SysNative\ApplicationFrameHost.exe*Microsoft Edge = 0x00000001
DELA0B9.7MT018430UHS\C:\WINDOWS\SysNative\ApplicationFrameHost.exe = 0x00000001
////////////////////////////////////////
13:58:19.699...Log opened
13:58:19.742...LanguageID = 00000809 00000809 00000809
13:58:19.746...Build = 1.40.0.1928
13:58:19.746...Windows handles = 00020134 000100C6 00010138
13:58:19.746...OS monitor sleep timeout value = 600 ms.
13:58:19.747...Applied DPI = 96-96
13:58:19.747...VM = 0
13:58:19.878...Starting enumeration
13:58:19.944...1. DELA0B9.7MT018430UHS on Intel(R) HD Graphics 530
13:58:19.945......Monitor assignment = 1
13:58:19.945......Adapter name = \\.\DISPLAY1
13:58:19.945......Monitor name = Generic PnP Monitor
13:58:19.946......Vendor ID = 8086
13:58:19.947......GPU driver = igdumdim64 24.20.100.6286
13:58:19.947......Flags = 00000005.00000003
13:58:19.948......Display tag = 2328A5B8
13:58:19.948......Monitor number = 1
13:58:19.948......Monitor handle = 00010001
13:58:19.949......Raw EDID = 00FFFFFFFFFFFF0010ACB9A0534855300E1C0104A53420783A0495A9554D9D26105054A54B00714F8180A940D1C0D100010101010101283C80A070B023403020360006442100001E000000FF00374D543031383433305548530A000000FC0044454C4C2055323431350A2020000000FD00313D1E5311000A2020202020200123
13:58:20.015......VCP10 = 0064004B
13:58:20.015......OS device handle = 00010001.00000000
13:58:20.016......Capabilities string = (prot(monitor)type(lcd)model(u2415)cmds(01 02 03 07 0c e3 f3)vcp(02 04 05 08 10 12 14(04 0b 05 06 08 09 0c) 16 18 1a 52 60(0f 10 11 12) aa(01 02 04) ac ae b2 b6 c6 c8 c9 d6(01 04 05) dc(00 02 03 05) df e0 e1 e2(00 01 02 04 14 19 0c 0d 0f 10 11 13) f0(00 08) f1(01 02) f2 fd)mswhql(1)asset_eep(40)mccs_ver(2.1)) (cached)
13:58:20.246......Configuration = FF0003.FF0062.1C0E
13:58:20.248......Model = Dell U2415
13:58:20.248......Model year = FY15
13:58:20.249......Capabilities = (prot(monitor)type(lcd)model(u2415)cmds(01 02 03 07 0c e3 f3)vcp(02 04 05 08 10 12 14(04 0b 05 06 08 09 0c) 16 18 1a 52 60(0f 10 11 12) aa(01 02 04) ac ae b2 b6 c6 c8 c9 d6(01 04 05) dc(00 02 03 05) df e0 e1 e2(00 01 02 04 14 19 0c 0d 0f 10 11 13) f0(00 08) f1(01 02) f2 fd)mswhql(1)asset_eep(40)mccs_ver(2.1)) (cached)
13:58:20.250......Opcodes supported = 02,04,05,08,10,12,14,16,18,1A,52,60,AA,AC,AE,B2,B6,C6,C8,C9,D6,DC,DF,E0,E1,E2,F0,F1,F2,FD
13:58:20.368......Timing = 74.10 kHz (-), 60.00 Hz (-)
13:58:20.370...Ending enumeration
13:58:20.371...New=DELA0B9.0003
13:58:20.373...Creating VCP table on DELA0B9.7MT018430UHS
13:58:20.431......Opcode 0x12 = 0064004B
13:58:20.539......Opcode 0x60 = 00120010
13:58:20.654......Opcode 0xAA = 00FF0001
13:58:20.773......Opcode 0xC8 = 00111109
13:58:20.880......Opcode 0xE2 = 00190000
13:58:21.165...Video power down timeout = 600
13:58:21.168...Display powered ON
13:58:21.169...User session connect
13:58:21.176...Auto-saving window layout...
14:04:21.630...Refreshing screen object
14:04:22.175...Attempting to auto-restore window layout...
14:04:45.525...Refreshing screen object
14:04:46.032...Attempting to auto-restore window layout...
14:05:36.085...Refreshing screen object
14:05:36.622...Attempting to auto-restore window layout...
14:06:37.964...Old=DELA0B9.0003
14:06:37.966...New=Default_Monitor.0002
14:06:37.966...HPD event detected... pausing
14:06:41.967...Changed display configuration
14:06:41.971...Starting enumeration
14:06:41.973......Skipping unsupported device MONITOR\Default_Monitor\{4d36e96e-e325-11ce-bfc1-08002be10318}\0002
14:06:41.974...Ending enumeration
14:06:41.979...Attempting to auto-restore window layout...
14:12:14.103...Old=Default_Monitor.0002
14:12:14.103...New=
14:12:14.104...HPD event detected... pausing
14:12:18.114...Changed display configuration
14:12:18.118...Starting enumeration
14:12:18.178...1. DELA0B9.7MT018430UHS on Intel(R) HD Graphics 530
14:12:18.178......Monitor assignment = 1
14:12:18.178......Adapter name = \\.\DISPLAY1
14:12:18.178......Monitor name = Generic PnP Monitor
14:12:18.178......Vendor ID = 8086
14:12:18.179......GPU driver = igdumdim64 24.20.100.6286
14:12:18.179......Flags = 00000005.00000003
14:12:18.180......Display tag = 2328A5B8
14:12:18.180......Monitor number = 1
14:12:18.181......Monitor handle = 00010001
14:12:18.181......Raw EDID = 00FFFFFFFFFFFF0010ACB9A0534855300E1C0104A53420783A0495A9554D9D26105054A54B00714F8180A940D1C0D100010101010101283C80A070B023403020360006442100001E000000FF00374D543031383433305548530A000000FC0044454C4C2055323431350A2020000000FD00313D1E5311000A2020202020200123
14:12:18.237......VCP10 = 0064004B
14:12:18.239......OS device handle = 00010001.00000000
14:12:18.239......Capabilities string = (prot(monitor)type(lcd)model(u2415)cmds(01 02 03 07 0c e3 f3)vcp(02 04 05 08 10 12 14(04 0b 05 06 08 09 0c) 16 18 1a 52 60(0f 10 11 12) aa(01 02 04) ac ae b2 b6 c6 c8 c9 d6(01 04 05) dc(00 02 03 05) df e0 e1 e2(00 01 02 04 14 19 0c 0d 0f 10 11 13) f0(00 08) f1(01 02) f2 fd)mswhql(1)asset_eep(40)mccs_ver(2.1)) (cached)
14:12:18.475......Configuration = FF0003.FF0062.1C0E
14:12:18.476......Model = Dell U2415
14:12:18.476......Model year = FY15
14:12:18.476......Capabilities = (prot(monitor)type(lcd)model(u2415)cmds(01 02 03 07 0c e3 f3)vcp(02 04 05 08 10 12 14(04 0b 05 06 08 09 0c) 16 18 1a 52 60(0f 10 11 12) aa(01 02 04) ac ae b2 b6 c6 c8 c9 d6(01 04 05) dc(00 02 03 05) df e0 e1 e2(00 01 02 04 14 19 0c 0d 0f 10 11 13) f0(00 08) f1(01 02) f2 fd)mswhql(1)asset_eep(40)mccs_ver(2.1)) (cached)
14:12:18.476......Opcodes supported = 02,04,05,08,10,12,14,16,18,1A,52,60,AA,AC,AE,B2,B6,C6,C8,C9,D6,DC,DF,E0,E1,E2,F0,F1,F2,FD
14:12:18.580......Timing = Invalid data (0.00 kHz (-), 0.00 Hz (-))
14:12:18.580...Ending enumeration
14:12:18.581...New=DELA0B9.0003
14:12:18.585...Creating VCP table on DELA0B9.7MT018430UHS
14:12:18.653......Opcode 0x12 = 0064004B
14:12:18.775......Opcode 0x60 = 00120010
14:12:18.883......Opcode 0xAA = 00FF0001
14:12:19.006......Opcode 0xC8 = 00111109
14:12:19.120......Opcode 0xE2 = 00190000
14:12:19.560...Attempting to auto-restore window layout...
14:12:38.906...Refreshing screen object
14:12:39.440...Attempting to auto-restore window layout...
14:12:57.654......Error: GetVCPAAh: 0xC0262582.00010001 = An error occurred while transmitting data to the device on the I2C bus
14:12:57.776......Error: GetVCPAAh: 0xC0262582.00010001 = An error occurred while transmitting data to the device on the I2C bus
14:12:58.026......Error: GetVCPAAh: 0xC0262582.00010001 = An error occurred while transmitting data to the device on the I2C bus
14:13:03.230...Refreshing screen object
14:13:03.754...Attempting to auto-restore window layout...
14:57:33.935...Saving window layout...
14:57:48.566...Refreshing screen object
14:57:49.075...Attempting to auto-restore window layout...
14:58:11.266...Saving window layout...
14:58:26.330...Refreshing screen object
14:58:26.851...Attempting to auto-restore window layout...
20:39:20.226...Refreshing Dell U2415 on Intel(R) HD Graphics 530
20:43:12.204...Refreshing screen object
20:45:10.940...\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
20:45:10.940...Dump: complete Windows device enumeration
20:45:10.940...1.DeviceName      = \\.\DISPLAY1
20:45:10.941.....DeviceFlags     = 00000005
20:45:10.941.....DeviceString    = Intel(R) HD Graphics 530
20:45:10.941.....DeviceID        = PCI\VEN_8086&DEV_1912&SUBSYS_86941043&REV_06
20:45:10.942.....DeviceKey       = \Registry\Machine\System\CurrentControlSet\Control\Video\{0D14CDEB-5F25-11E8-8CAA-E3941D19ECE7}\0000
20:45:10.942.....a.MonitorName   = \\.\DISPLAY1\Monitor0
20:45:10.943.......MonitorFlags  = 00000003
20:45:10.943.......MonitorString = Generic PnP Monitor
20:45:10.943.......MonitorID     = MONITOR\DELA0B9\{4d36e96e-e325-11ce-bfc1-08002be10318}\0003
20:45:10.944.......MonitorKey    = \Registry\Machine\System\CurrentControlSet\Control\Class\{4d36e96e-e325-11ce-bfc1-08002be10318}\0003
20:45:10.944.......Raw EDID      = 00FFFFFFFFFFFF0010ACB9A0534855300E1C0104A53420783A0495A9554D9D26105054A54B00714F8180A940D1C0D100010101010101283C80A070B023403020360006442100001E000000FF00374D543031383433305548530A000000FC0044454C4C2055323431350A2020000000FD00313D1E5311000A2020202020200123
20:45:10.945...2.DeviceName      = \\.\DISPLAY2
20:45:10.945.....DeviceFlags     = 00000000
20:45:10.945.....DeviceString    = Intel(R) HD Graphics 530
20:45:10.945.....DeviceID        = PCI\VEN_8086&DEV_1912&SUBSYS_86941043&REV_06
20:45:10.946.....DeviceKey       = \Registry\Machine\System\CurrentControlSet\Control\Video\{0D14CDEB-5F25-11E8-8CAA-E3941D19ECE7}\0001
20:45:10.946...3.DeviceName      = \\.\DISPLAY3
20:45:10.946.....DeviceFlags     = 00000000
20:45:10.947.....DeviceString    = Intel(R) HD Graphics 530
20:45:10.947.....DeviceID        = PCI\VEN_8086&DEV_1912&SUBSYS_86941043&REV_06
20:45:10.947.....DeviceKey       = \Registry\Machine\System\CurrentControlSet\Control\Video\{0D14CDEB-5F25-11E8-8CAA-E3941D19ECE7}\0002
20:45:10.947...Total number of monitors enumerated = 1
20:45:10.948...\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
20:45:10.948...Dumping VCP table on DELA0B9.7MT018430UHS
20:45:11.012......Opcode 0x02 = 00020002
20:45:11.135......Opcode 0x10 = 0064004B
20:45:11.258......Opcode 0x12 = 0064004B
20:45:11.388......Opcode 0x14 = 000C0005
20:45:11.502......Opcode 0x16 = 00640064
20:45:11.619......Opcode 0x18 = 00640064
20:45:11.734......Opcode 0x1A = 00640064
20:45:11.850......Opcode 0x52 = 00FF00F2
20:45:11.973......Opcode 0x60 = 00120010
20:45:12.096......Opcode 0xAA = 00FF0001
20:45:12.204......Opcode 0xAC = 00012174
20:45:12.327......Opcode 0xAE = FFFF1770
20:45:12.450......Opcode 0xB2 = 00010001
20:45:12.573......Opcode 0xB6 = 00050003
20:45:12.697......Opcode 0xC6 = FFFF45CC
20:45:12.820......Opcode 0xC8 = 00111109
20:45:12.928......Opcode 0xC9 = FFFF4201
20:45:13.036......Opcode 0xD6 = 00050001
20:45:13.143......Opcode 0xDC = 00050000
20:45:13.266......Opcode 0xDF = FFFF0201
20:45:13.390......Opcode 0xE2 = 00190000
20:45:13.513......Opcode 0xF0 = 00FF0000
20:45:13.636......Opcode 0xF1 = 00FF0003
20:45:13.759......Opcode 0xF2 = 00FF0000
20:45:13.882......Opcode 0xFD = 00FF0062
20:45:13.942......VCP table dumped

 

??

My reply appeared yesterday, immediately after posting. But now it's gone.

Second time this has happened in two days. No explanation?

Here's another attempt, without the benefit of the copy that I deleted after the reported 'successful' send.

--------------------

Correct, the same result, with the two visible windows shifted top left.

Your suspicion sounds right on the mark. On Wednesday I'd carefully measured the size  of the 'top left result' as 1022x736. Its position was -2,-2 so 1022+2 = 24 and 736+2+30 for taskbar = 768. But why should the OS do such an odd thing? And to an AR of 4:3? Just as puzzling, where does it gets its info if DDM has been uninstalled?

Here's the diagnostic report as requested.

Diagnostic Report, generated 13/09/18 (10.0.17134)
Copyright (c) 1995-2018, EnTech Taiwan.
Version = 1.40.0.1928
OS = 10.0.17134.2 x64
Mechanism = 3
Account = Standard
Command line = "C:\Program Files (x86)\Dell\Dell Display Manager\ddm.exe"
////////////////////////////////////////
GridType = 0x00000000
GridType.DELA0B9.7MT018430UHS = 0x00000000
GridType.DELA0B9.7MT018430UHS{DB5A122C-A3B5-470C-8C46-923F6607AC34} = 0x00000000
ExtEA.1{DB5A122C-A3B5-470C-8C46-923F6607AC34} = 0x00000000
ExtEA.DELA0B9.7MT018430UHS{DB5A122C-A3B5-470C-8C46-923F6607AC34} = 0x00000000
GridType.1{DB5A122C-A3B5-470C-8C46-923F6607AC34} = 0x00000000
KbFix = 0x00000001
GlassBorder.DELA0B9.7MT018430UHS = 0x00000000
LastCheck = 0x0000A95C
HintShown = 0x00000001
AutoRestoreWindowLayout = 0x00000001
AppScan.DELA0B9.7MT018430UHS = 0x00000004
DELA0B9 = 0x00000001
FW.DELA0B9.7MT018430UHS = 0x00004201
EnumErrorCount = 0x00000000
Metro.DELA0B9.7MT018430UHS = 0x00000001
D3D.DELA0B9.7MT018430UHS = 0x00000004
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Dell\Dell Display Manager\ddm.exe = 0x00000000
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Dell\Dell Display Manager\ddm.d3d = 0x00000004
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Microsoft Office\Root\Office16\OUTLOOK.EXE = 0x00000000
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Microsoft Office\Root\Office16\WINWORD.EXE = 0x00000000
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Microsoft Office\Root\Office16\POWERPNT.EXE = 0x00000001
DELA0B9.7MT018430UHS\C:\Program Files\Waterfox\waterfox.exe = 0x00000001
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Microsoft Office\Root\Office16\EXCEL.EXE = 0x00000000
DELA0B9.7MT018430UHS\C:\Program Files\Windows NT\Accessories\WORDPAD.EXE = 0x00000000
DELA0B9.7MT018430UHS\C:\WINDOWS\system32\mspaint.exe = 0x00000001
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Windows Media Player\wmplayer.exe = 0x00000002
DELA0B9.7MT018430UHS\C:\Program Files\Internet Explorer\IEXPLORE.EXE = 0x00000001
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe = 0x00000000
DELA0B9.7MT018430UHS\C:\WINDOWS\SysNative\ApplicationFrameHost.exe*Microsoft Edge = 0x00000001
DELA0B9.7MT018430UHS\C:\WINDOWS\SysNative\ApplicationFrameHost.exe = 0x00000001
////////////////////////////////////////
13:58:19.699...Log opened
13:58:19.742...LanguageID = 00000809 00000809 00000809
13:58:19.746...Build = 1.40.0.1928
13:58:19.746...Windows handles = 00020134 000100C6 00010138
13:58:19.746...OS monitor sleep timeout value = 600 ms.
13:58:19.747...Applied DPI = 96-96
13:58:19.747...VM = 0
13:58:19.878...Starting enumeration
13:58:19.944...1. DELA0B9.7MT018430UHS on Intel(R) HD Graphics 530
13:58:19.945......Monitor assignment = 1
13:58:19.945......Adapter name = \\.\DISPLAY1
13:58:19.945......Monitor name = Generic PnP Monitor
13:58:19.946......Vendor ID = 8086
13:58:19.947......GPU driver = igdumdim64 24.20.100.6286
13:58:19.947......Flags = 00000005.00000003
13:58:19.948......Display tag = 2328A5B8
13:58:19.948......Monitor number = 1
13:58:19.948......Monitor handle = 00010001
13:58:19.949......Raw EDID = 00FFFFFFFFFFFF0010ACB9A0534855300E1C0104A53420783A0495A9554D9D26105054A54B00714F8180A940D1C0D100010101010101283C80A070B023403020360006442100001E000000FF00374D543031383433305548530A000000FC0044454C4C2055323431350A2020000000FD00313D1E5311000A2020202020200123
13:58:20.015......VCP10 = 0064004B
13:58:20.015......OS device handle = 00010001.00000000
13:58:20.016......Capabilities string = (prot(monitor)type(lcd)model(u2415)cmds(01 02 03 07 0c e3 f3)vcp(02 04 05 08 10 12 14(04 0b 05 06 08 09 0c) 16 18 1a 52 60(0f 10 11 12) aa(01 02 04) ac ae b2 b6 c6 c8 c9 d6(01 04 05) dc(00 02 03 05) df e0 e1 e2(00 01 02 04 14 19 0c 0d 0f 10 11 13) f0(00 08) f1(01 02) f2 fd)mswhql(1)asset_eep(40)mccs_ver(2.1)) (cached)
13:58:20.246......Configuration = FF0003.FF0062.1C0E
13:58:20.248......Model = Dell U2415
13:58:20.248......Model year = FY15
13:58:20.249......Capabilities = (prot(monitor)type(lcd)model(u2415)cmds(01 02 03 07 0c e3 f3)vcp(02 04 05 08 10 12 14(04 0b 05 06 08 09 0c) 16 18 1a 52 60(0f 10 11 12) aa(01 02 04) ac ae b2 b6 c6 c8 c9 d6(01 04 05) dc(00 02 03 05) df e0 e1 e2(00 01 02 04 14 19 0c 0d 0f 10 11 13) f0(00 08) f1(01 02) f2 fd)mswhql(1)asset_eep(40)mccs_ver(2.1)) (cached)
13:58:20.250......Opcodes supported = 02,04,05,08,10,12,14,16,18,1A,52,60,AA,AC,AE,B2,B6,C6,C8,C9,D6,DC,DF,E0,E1,E2,F0,F1,F2,FD
13:58:20.368......Timing = 74.10 kHz (-), 60.00 Hz (-)
13:58:20.370...Ending enumeration
13:58:20.371...New=DELA0B9.0003
13:58:20.373...Creating VCP table on DELA0B9.7MT018430UHS
13:58:20.431......Opcode 0x12 = 0064004B
13:58:20.539......Opcode 0x60 = 00120010
13:58:20.654......Opcode 0xAA = 00FF0001
13:58:20.773......Opcode 0xC8 = 00111109
13:58:20.880......Opcode 0xE2 = 00190000
13:58:21.165...Video power down timeout = 600
13:58:21.168...Display powered ON
13:58:21.169...User session connect
13:58:21.176...Auto-saving window layout...
14:04:21.630...Refreshing screen object
14:04:22.175...Attempting to auto-restore window layout...
14:04:45.525...Refreshing screen object
14:04:46.032...Attempting to auto-restore window layout...
14:05:36.085...Refreshing screen object
14:05:36.622...Attempting to auto-restore window layout...
14:06:37.964...Old=DELA0B9.0003
14:06:37.966...New=Default_Monitor.0002
14:06:37.966...HPD event detected... pausing
14:06:41.967...Changed display configuration
14:06:41.971...Starting enumeration
14:06:41.973......Skipping unsupported device MONITOR\Default_Monitor\{4d36e96e-e325-11ce-bfc1-08002be10318}\0002
14:06:41.974...Ending enumeration
14:06:41.979...Attempting to auto-restore window layout...
14:12:14.103...Old=Default_Monitor.0002
14:12:14.103...New=
14:12:14.104...HPD event detected... pausing
14:12:18.114...Changed display configuration
14:12:18.118...Starting enumeration
14:12:18.178...1. DELA0B9.7MT018430UHS on Intel(R) HD Graphics 530
14:12:18.178......Monitor assignment = 1
14:12:18.178......Adapter name = \\.\DISPLAY1
14:12:18.178......Monitor name = Generic PnP Monitor
14:12:18.178......Vendor ID = 8086
14:12:18.179......GPU driver = igdumdim64 24.20.100.6286
14:12:18.179......Flags = 00000005.00000003
14:12:18.180......Display tag = 2328A5B8
14:12:18.180......Monitor number = 1
14:12:18.181......Monitor handle = 00010001
14:12:18.181......Raw EDID = 00FFFFFFFFFFFF0010ACB9A0534855300E1C0104A53420783A0495A9554D9D26105054A54B00714F8180A940D1C0D100010101010101283C80A070B023403020360006442100001E000000FF00374D543031383433305548530A000000FC0044454C4C2055323431350A2020000000FD00313D1E5311000A2020202020200123
14:12:18.237......VCP10 = 0064004B
14:12:18.239......OS device handle = 00010001.00000000
14:12:18.239......Capabilities string = (prot(monitor)type(lcd)model(u2415)cmds(01 02 03 07 0c e3 f3)vcp(02 04 05 08 10 12 14(04 0b 05 06 08 09 0c) 16 18 1a 52 60(0f 10 11 12) aa(01 02 04) ac ae b2 b6 c6 c8 c9 d6(01 04 05) dc(00 02 03 05) df e0 e1 e2(00 01 02 04 14 19 0c 0d 0f 10 11 13) f0(00 08) f1(01 02) f2 fd)mswhql(1)asset_eep(40)mccs_ver(2.1)) (cached)
14:12:18.475......Configuration = FF0003.FF0062.1C0E
14:12:18.476......Model = Dell U2415
14:12:18.476......Model year = FY15
14:12:18.476......Capabilities = (prot(monitor)type(lcd)model(u2415)cmds(01 02 03 07 0c e3 f3)vcp(02 04 05 08 10 12 14(04 0b 05 06 08 09 0c) 16 18 1a 52 60(0f 10 11 12) aa(01 02 04) ac ae b2 b6 c6 c8 c9 d6(01 04 05) dc(00 02 03 05) df e0 e1 e2(00 01 02 04 14 19 0c 0d 0f 10 11 13) f0(00 08) f1(01 02) f2 fd)mswhql(1)asset_eep(40)mccs_ver(2.1)) (cached)
14:12:18.476......Opcodes supported = 02,04,05,08,10,12,14,16,18,1A,52,60,AA,AC,AE,B2,B6,C6,C8,C9,D6,DC,DF,E0,E1,E2,F0,F1,F2,FD
14:12:18.580......Timing = Invalid data (0.00 kHz (-), 0.00 Hz (-))
14:12:18.580...Ending enumeration
14:12:18.581...New=DELA0B9.0003
14:12:18.585...Creating VCP table on DELA0B9.7MT018430UHS
14:12:18.653......Opcode 0x12 = 0064004B
14:12:18.775......Opcode 0x60 = 00120010
14:12:18.883......Opcode 0xAA = 00FF0001
14:12:19.006......Opcode 0xC8 = 00111109
14:12:19.120......Opcode 0xE2 = 00190000
14:12:19.560...Attempting to auto-restore window layout...
14:12:38.906...Refreshing screen object
14:12:39.440...Attempting to auto-restore window layout...
14:12:57.654......Error: GetVCPAAh: 0xC0262582.00010001 = An error occurred while transmitting data to the device on the I2C bus
14:12:57.776......Error: GetVCPAAh: 0xC0262582.00010001 = An error occurred while transmitting data to the device on the I2C bus
14:12:58.026......Error: GetVCPAAh: 0xC0262582.00010001 = An error occurred while transmitting data to the device on the I2C bus
14:13:03.230...Refreshing screen object
14:13:03.754...Attempting to auto-restore window layout...
14:57:33.935...Saving window layout...
14:57:48.566...Refreshing screen object
14:57:49.075...Attempting to auto-restore window layout...
14:58:11.266...Saving window layout...
14:58:26.330...Refreshing screen object
14:58:26.851...Attempting to auto-restore window layout...
20:39:20.226...Refreshing Dell U2415 on Intel(R) HD Graphics 530
20:43:12.204...Refreshing screen object
20:45:10.940...\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
20:45:10.940...Dump: complete Windows device enumeration
20:45:10.940...1.DeviceName      = \\.\DISPLAY1
20:45:10.941.....DeviceFlags     = 00000005
20:45:10.941.....DeviceString    = Intel(R) HD Graphics 530
20:45:10.941.....DeviceID        = PCI\VEN_8086&DEV_1912&SUBSYS_86941043&REV_06
20:45:10.942.....DeviceKey       = \Registry\Machine\System\CurrentControlSet\Control\Video\{0D14CDEB-5F25-11E8-8CAA-E3941D19ECE7}\0000
20:45:10.942.....a.MonitorName   = \\.\DISPLAY1\Monitor0
20:45:10.943.......MonitorFlags  = 00000003
20:45:10.943.......MonitorString = Generic PnP Monitor
20:45:10.943.......MonitorID     = MONITOR\DELA0B9\{4d36e96e-e325-11ce-bfc1-08002be10318}\0003
20:45:10.944.......MonitorKey    = \Registry\Machine\System\CurrentControlSet\Control\Class\{4d36e96e-e325-11ce-bfc1-08002be10318}\0003
20:45:10.944.......Raw EDID      = 00FFFFFFFFFFFF0010ACB9A0534855300E1C0104A53420783A0495A9554D9D26105054A54B00714F8180A940D1C0D100010101010101283C80A070B023403020360006442100001E000000FF00374D543031383433305548530A000000FC0044454C4C2055323431350A2020000000FD00313D1E5311000A2020202020200123
20:45:10.945...2.DeviceName      = \\.\DISPLAY2
20:45:10.945.....DeviceFlags     = 00000000
20:45:10.945.....DeviceString    = Intel(R) HD Graphics 530
20:45:10.945.....DeviceID        = PCI\VEN_8086&DEV_1912&SUBSYS_86941043&REV_06
20:45:10.946.....DeviceKey       = \Registry\Machine\System\CurrentControlSet\Control\Video\{0D14CDEB-5F25-11E8-8CAA-E3941D19ECE7}\0001
20:45:10.946...3.DeviceName      = \\.\DISPLAY3
20:45:10.946.....DeviceFlags     = 00000000
20:45:10.947.....DeviceString    = Intel(R) HD Graphics 530
20:45:10.947.....DeviceID        = PCI\VEN_8086&DEV_1912&SUBSYS_86941043&REV_06
20:45:10.947.....DeviceKey       = \Registry\Machine\System\CurrentControlSet\Control\Video\{0D14CDEB-5F25-11E8-8CAA-E3941D19ECE7}\0002
20:45:10.947...Total number of monitors enumerated = 1
20:45:10.948...\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
20:45:10.948...Dumping VCP table on DELA0B9.7MT018430UHS
20:45:11.012......Opcode 0x02 = 00020002
20:45:11.135......Opcode 0x10 = 0064004B
20:45:11.258......Opcode 0x12 = 0064004B
20:45:11.388......Opcode 0x14 = 000C0005
20:45:11.502......Opcode 0x16 = 00640064
20:45:11.619......Opcode 0x18 = 00640064
20:45:11.734......Opcode 0x1A = 00640064
20:45:11.850......Opcode 0x52 = 00FF00F2
20:45:11.973......Opcode 0x60 = 00120010
20:45:12.096......Opcode 0xAA = 00FF0001
20:45:12.204......Opcode 0xAC = 00012174
20:45:12.327......Opcode 0xAE = FFFF1770
20:45:12.450......Opcode 0xB2 = 00010001
20:45:12.573......Opcode 0xB6 = 00050003
20:45:12.697......Opcode 0xC6 = FFFF45CC
20:45:12.820......Opcode 0xC8 = 00111109
20:45:12.928......Opcode 0xC9 = FFFF4201
20:45:13.036......Opcode 0xD6 = 00050001
20:45:13.143......Opcode 0xDC = 00050000
20:45:13.266......Opcode 0xDF = FFFF0201
20:45:13.390......Opcode 0xE2 = 00190000
20:45:13.513......Opcode 0xF0 = 00FF0000
20:45:13.636......Opcode 0xF1 = 00FF0003
20:45:13.759......Opcode 0xF2 = 00FF0000
20:45:13.882......Opcode 0xFD = 00FF0062
20:45:13.942......VCP table dumped

What's going on here? Where are my last two posts, yesterday and this morning, which I re-posted after they disappeared from this thread?

Missing posts

EDIT: And as I now expect this will have a similarly short life, I suppose my only resort is to try posting them yet again, but in a new thread.

One last attempt before I try a new thread:

--------------------

Second time this has happened in two days. No explanation?

Here's another attempt, without the benefit of the copy that I deleted after the reported 'successful' send.

--------------------

Correct, the same result, with the two visible windows shifted top left.

Your suspicion sounds right on the mark. On Wednesday I'd carefully measured the size  of the 'top left result' as 1022x736. Its position was -2,-2 so 1022+2 = 24 and 736+2+30 for taskbar = 768. But why should the OS do such an odd thing? And to an AR of 4:3? Just as puzzling, where does it gets its info if DDM has been uninstalled?

Here's the diagnostic report as requested.

Diagnostic Report, generated 13/09/18 (10.0.17134)
Copyright (c) 1995-2018, EnTech Taiwan.
Version = 1.40.0.1928
OS = 10.0.17134.2 x64
Mechanism = 3
Account = Standard
Command line = "C:\Program Files (x86)\Dell\Dell Display Manager\ddm.exe"
////////////////////////////////////////
GridType = 0x00000000
GridType.DELA0B9.7MT018430UHS = 0x00000000
GridType.DELA0B9.7MT018430UHS{DB5A122C-A3B5-470C-8C46-923F6607AC34} = 0x00000000
ExtEA.1{DB5A122C-A3B5-470C-8C46-923F6607AC34} = 0x00000000
ExtEA.DELA0B9.7MT018430UHS{DB5A122C-A3B5-470C-8C46-923F6607AC34} = 0x00000000
GridType.1{DB5A122C-A3B5-470C-8C46-923F6607AC34} = 0x00000000
KbFix = 0x00000001
GlassBorder.DELA0B9.7MT018430UHS = 0x00000000
LastCheck = 0x0000A95C
HintShown = 0x00000001
AutoRestoreWindowLayout = 0x00000001
AppScan.DELA0B9.7MT018430UHS = 0x00000004
DELA0B9 = 0x00000001
FW.DELA0B9.7MT018430UHS = 0x00004201
EnumErrorCount = 0x00000000
Metro.DELA0B9.7MT018430UHS = 0x00000001
D3D.DELA0B9.7MT018430UHS = 0x00000004
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Dell\Dell Display Manager\ddm.exe = 0x00000000
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Dell\Dell Display Manager\ddm.d3d = 0x00000004
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Microsoft Office\Root\Office16\OUTLOOK.EXE = 0x00000000
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Microsoft Office\Root\Office16\WINWORD.EXE = 0x00000000
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Microsoft Office\Root\Office16\POWERPNT.EXE = 0x00000001
DELA0B9.7MT018430UHS\C:\Program Files\Waterfox\waterfox.exe = 0x00000001
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Microsoft Office\Root\Office16\EXCEL.EXE = 0x00000000
DELA0B9.7MT018430UHS\C:\Program Files\Windows NT\Accessories\WORDPAD.EXE = 0x00000000
DELA0B9.7MT018430UHS\C:\WINDOWS\system32\mspaint.exe = 0x00000001
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Windows Media Player\wmplayer.exe = 0x00000002
DELA0B9.7MT018430UHS\C:\Program Files\Internet Explorer\IEXPLORE.EXE = 0x00000001
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe = 0x00000000
DELA0B9.7MT018430UHS\C:\WINDOWS\SysNative\ApplicationFrameHost.exe*Microsoft Edge = 0x00000001
DELA0B9.7MT018430UHS\C:\WINDOWS\SysNative\ApplicationFrameHost.exe = 0x00000001
////////////////////////////////////////
13:58:19.699...Log opened
13:58:19.742...LanguageID = 00000809 00000809 00000809
13:58:19.746...Build = 1.40.0.1928
13:58:19.746...Windows handles = 00020134 000100C6 00010138
13:58:19.746...OS monitor sleep timeout value = 600 ms.
13:58:19.747...Applied DPI = 96-96
13:58:19.747...VM = 0
13:58:19.878...Starting enumeration
13:58:19.944...1. DELA0B9.7MT018430UHS on Intel(R) HD Graphics 530
13:58:19.945......Monitor assignment = 1
13:58:19.945......Adapter name = \\.\DISPLAY1
13:58:19.945......Monitor name = Generic PnP Monitor
13:58:19.946......Vendor ID = 8086
13:58:19.947......GPU driver = igdumdim64 24.20.100.6286
13:58:19.947......Flags = 00000005.00000003
13:58:19.948......Display tag = 2328A5B8
13:58:19.948......Monitor number = 1
13:58:19.948......Monitor handle = 00010001
13:58:19.949......Raw EDID = 00FFFFFFFFFFFF0010ACB9A0534855300E1C0104A53420783A0495A9554D9D26105054A54B00714F8180A940D1C0D100010101010101283C80A070B023403020360006442100001E000000FF00374D543031383433305548530A000000FC0044454C4C2055323431350A2020000000FD00313D1E5311000A2020202020200123
13:58:20.015......VCP10 = 0064004B
13:58:20.015......OS device handle = 00010001.00000000
13:58:20.016......Capabilities string = (prot(monitor)type(lcd)model(u2415)cmds(01 02 03 07 0c e3 f3)vcp(02 04 05 08 10 12 14(04 0b 05 06 08 09 0c) 16 18 1a 52 60(0f 10 11 12) aa(01 02 04) ac ae b2 b6 c6 c8 c9 d6(01 04 05) dc(00 02 03 05) df e0 e1 e2(00 01 02 04 14 19 0c 0d 0f 10 11 13) f0(00 08) f1(01 02) f2 fd)mswhql(1)asset_eep(40)mccs_ver(2.1)) (cached)
13:58:20.246......Configuration = FF0003.FF0062.1C0E
13:58:20.248......Model = Dell U2415
13:58:20.248......Model year = FY15
13:58:20.249......Capabilities = (prot(monitor)type(lcd)model(u2415)cmds(01 02 03 07 0c e3 f3)vcp(02 04 05 08 10 12 14(04 0b 05 06 08 09 0c) 16 18 1a 52 60(0f 10 11 12) aa(01 02 04) ac ae b2 b6 c6 c8 c9 d6(01 04 05) dc(00 02 03 05) df e0 e1 e2(00 01 02 04 14 19 0c 0d 0f 10 11 13) f0(00 08) f1(01 02) f2 fd)mswhql(1)asset_eep(40)mccs_ver(2.1)) (cached)
13:58:20.250......Opcodes supported = 02,04,05,08,10,12,14,16,18,1A,52,60,AA,AC,AE,B2,B6,C6,C8,C9,D6,DC,DF,E0,E1,E2,F0,F1,F2,FD
13:58:20.368......Timing = 74.10 kHz (-), 60.00 Hz (-)
13:58:20.370...Ending enumeration
13:58:20.371...New=DELA0B9.0003
13:58:20.373...Creating VCP table on DELA0B9.7MT018430UHS
13:58:20.431......Opcode 0x12 = 0064004B
13:58:20.539......Opcode 0x60 = 00120010
13:58:20.654......Opcode 0xAA = 00FF0001
13:58:20.773......Opcode 0xC8 = 00111109
13:58:20.880......Opcode 0xE2 = 00190000
13:58:21.165...Video power down timeout = 600
13:58:21.168...Display powered ON
13:58:21.169...User session connect
13:58:21.176...Auto-saving window layout...
14:04:21.630...Refreshing screen object
14:04:22.175...Attempting to auto-restore window layout...
14:04:45.525...Refreshing screen object
14:04:46.032...Attempting to auto-restore window layout...
14:05:36.085...Refreshing screen object
14:05:36.622...Attempting to auto-restore window layout...
14:06:37.964...Old=DELA0B9.0003
14:06:37.966...New=Default_Monitor.0002
14:06:37.966...HPD event detected... pausing
14:06:41.967...Changed display configuration
14:06:41.971...Starting enumeration
14:06:41.973......Skipping unsupported device MONITOR\Default_Monitor\{4d36e96e-e325-11ce-bfc1-08002be10318}\0002
14:06:41.974...Ending enumeration
14:06:41.979...Attempting to auto-restore window layout...
14:12:14.103...Old=Default_Monitor.0002
14:12:14.103...New=
14:12:14.104...HPD event detected... pausing
14:12:18.114...Changed display configuration
14:12:18.118...Starting enumeration
14:12:18.178...1. DELA0B9.7MT018430UHS on Intel(R) HD Graphics 530
14:12:18.178......Monitor assignment = 1
14:12:18.178......Adapter name = \\.\DISPLAY1
14:12:18.178......Monitor name = Generic PnP Monitor
14:12:18.178......Vendor ID = 8086
14:12:18.179......GPU driver = igdumdim64 24.20.100.6286
14:12:18.179......Flags = 00000005.00000003
14:12:18.180......Display tag = 2328A5B8
14:12:18.180......Monitor number = 1
14:12:18.181......Monitor handle = 00010001
14:12:18.181......Raw EDID = 00FFFFFFFFFFFF0010ACB9A0534855300E1C0104A53420783A0495A9554D9D26105054A54B00714F8180A940D1C0D100010101010101283C80A070B023403020360006442100001E000000FF00374D543031383433305548530A000000FC0044454C4C2055323431350A2020000000FD00313D1E5311000A2020202020200123
14:12:18.237......VCP10 = 0064004B
14:12:18.239......OS device handle = 00010001.00000000
14:12:18.239......Capabilities string = (prot(monitor)type(lcd)model(u2415)cmds(01 02 03 07 0c e3 f3)vcp(02 04 05 08 10 12 14(04 0b 05 06 08 09 0c) 16 18 1a 52 60(0f 10 11 12) aa(01 02 04) ac ae b2 b6 c6 c8 c9 d6(01 04 05) dc(00 02 03 05) df e0 e1 e2(00 01 02 04 14 19 0c 0d 0f 10 11 13) f0(00 08) f1(01 02) f2 fd)mswhql(1)asset_eep(40)mccs_ver(2.1)) (cached)
14:12:18.475......Configuration = FF0003.FF0062.1C0E
14:12:18.476......Model = Dell U2415
14:12:18.476......Model year = FY15
14:12:18.476......Capabilities = (prot(monitor)type(lcd)model(u2415)cmds(01 02 03 07 0c e3 f3)vcp(02 04 05 08 10 12 14(04 0b 05 06 08 09 0c) 16 18 1a 52 60(0f 10 11 12) aa(01 02 04) ac ae b2 b6 c6 c8 c9 d6(01 04 05) dc(00 02 03 05) df e0 e1 e2(00 01 02 04 14 19 0c 0d 0f 10 11 13) f0(00 08) f1(01 02) f2 fd)mswhql(1)asset_eep(40)mccs_ver(2.1)) (cached)
14:12:18.476......Opcodes supported = 02,04,05,08,10,12,14,16,18,1A,52,60,AA,AC,AE,B2,B6,C6,C8,C9,D6,DC,DF,E0,E1,E2,F0,F1,F2,FD
14:12:18.580......Timing = Invalid data (0.00 kHz (-), 0.00 Hz (-))
14:12:18.580...Ending enumeration
14:12:18.581...New=DELA0B9.0003
14:12:18.585...Creating VCP table on DELA0B9.7MT018430UHS
14:12:18.653......Opcode 0x12 = 0064004B
14:12:18.775......Opcode 0x60 = 00120010
14:12:18.883......Opcode 0xAA = 00FF0001
14:12:19.006......Opcode 0xC8 = 00111109
14:12:19.120......Opcode 0xE2 = 00190000
14:12:19.560...Attempting to auto-restore window layout...
14:12:38.906...Refreshing screen object
14:12:39.440...Attempting to auto-restore window layout...
14:12:57.654......Error: GetVCPAAh: 0xC0262582.00010001 = An error occurred while transmitting data to the device on the I2C bus
14:12:57.776......Error: GetVCPAAh: 0xC0262582.00010001 = An error occurred while transmitting data to the device on the I2C bus
14:12:58.026......Error: GetVCPAAh: 0xC0262582.00010001 = An error occurred while transmitting data to the device on the I2C bus
14:13:03.230...Refreshing screen object
14:13:03.754...Attempting to auto-restore window layout...
14:57:33.935...Saving window layout...
14:57:48.566...Refreshing screen object
14:57:49.075...Attempting to auto-restore window layout...
14:58:11.266...Saving window layout...
14:58:26.330...Refreshing screen object
14:58:26.851...Attempting to auto-restore window layout...
20:39:20.226...Refreshing Dell U2415 on Intel(R) HD Graphics 530
20:43:12.204...Refreshing screen object
20:45:10.940...\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
20:45:10.940...Dump: complete Windows device enumeration
20:45:10.940...1.DeviceName      = \\.\DISPLAY1
20:45:10.941.....DeviceFlags     = 00000005
20:45:10.941.....DeviceString    = Intel(R) HD Graphics 530
20:45:10.941.....DeviceID        = PCI\VEN_8086&DEV_1912&SUBSYS_86941043&REV_06
20:45:10.942.....DeviceKey       = \Registry\Machine\System\CurrentControlSet\Control\Video\{0D14CDEB-5F25-11E8-8CAA-E3941D19ECE7}\0000
20:45:10.942.....a.MonitorName   = \\.\DISPLAY1\Monitor0
20:45:10.943.......MonitorFlags  = 00000003
20:45:10.943.......MonitorString = Generic PnP Monitor
20:45:10.943.......MonitorID     = MONITOR\DELA0B9\{4d36e96e-e325-11ce-bfc1-08002be10318}\0003
20:45:10.944.......MonitorKey    = \Registry\Machine\System\CurrentControlSet\Control\Class\{4d36e96e-e325-11ce-bfc1-08002be10318}\0003
20:45:10.944.......Raw EDID      = 00FFFFFFFFFFFF0010ACB9A0534855300E1C0104A53420783A0495A9554D9D26105054A54B00714F8180A940D1C0D100010101010101283C80A070B023403020360006442100001E000000FF00374D543031383433305548530A000000FC0044454C4C2055323431350A2020000000FD00313D1E5311000A2020202020200123
20:45:10.945...2.DeviceName      = \\.\DISPLAY2
20:45:10.945.....DeviceFlags     = 00000000
20:45:10.945.....DeviceString    = Intel(R) HD Graphics 530
20:45:10.945.....DeviceID        = PCI\VEN_8086&DEV_1912&SUBSYS_86941043&REV_06
20:45:10.946.....DeviceKey       = \Registry\Machine\System\CurrentControlSet\Control\Video\{0D14CDEB-5F25-11E8-8CAA-E3941D19ECE7}\0001
20:45:10.946...3.DeviceName      = \\.\DISPLAY3
20:45:10.946.....DeviceFlags     = 00000000
20:45:10.947.....DeviceString    = Intel(R) HD Graphics 530
20:45:10.947.....DeviceID        = PCI\VEN_8086&DEV_1912&SUBSYS_86941043&REV_06
20:45:10.947.....DeviceKey       = \Registry\Machine\System\CurrentControlSet\Control\Video\{0D14CDEB-5F25-11E8-8CAA-E3941D19ECE7}\0002
20:45:10.947...Total number of monitors enumerated = 1
20:45:10.948...\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
20:45:10.948...Dumping VCP table on DELA0B9.7MT018430UHS
20:45:11.012......Opcode 0x02 = 00020002
20:45:11.135......Opcode 0x10 = 0064004B
20:45:11.258......Opcode 0x12 = 0064004B
20:45:11.388......Opcode 0x14 = 000C0005
20:45:11.502......Opcode 0x16 = 00640064
20:45:11.619......Opcode 0x18 = 00640064
20:45:11.734......Opcode 0x1A = 00640064
20:45:11.850......Opcode 0x52 = 00FF00F2
20:45:11.973......Opcode 0x60 = 00120010
20:45:12.096......Opcode 0xAA = 00FF0001
20:45:12.204......Opcode 0xAC = 00012174
20:45:12.327......Opcode 0xAE = FFFF1770
20:45:12.450......Opcode 0xB2 = 00010001
20:45:12.573......Opcode 0xB6 = 00050003
20:45:12.697......Opcode 0xC6 = FFFF45CC
20:45:12.820......Opcode 0xC8 = 00111109
20:45:12.928......Opcode 0xC9 = FFFF4201
20:45:13.036......Opcode 0xD6 = 00050001
20:45:13.143......Opcode 0xDC = 00050000
20:45:13.266......Opcode 0xDF = FFFF0201
20:45:13.390......Opcode 0xE2 = 00190000
20:45:13.513......Opcode 0xF0 = 00FF0000
20:45:13.636......Opcode 0xF1 = 00FF0003
20:45:13.759......Opcode 0xF2 = 00FF0000
20:45:13.882......Opcode 0xFD = 00FF0062
20:45:13.942......VCP table dumped



Terry, East Grinstead, UK
Friday 14 September 2018, 1104

I've made several attempts to re-send posts that have been promptly published but then disappeared shortly afterwards. So I'm reposting here.

I suspect the 'Next page' function is broken. On one rare occasion it appeared, offering page 2, but on using Next my later post were still missing. And the page links were then missing.

Here's my post from earlier this morning:

--------------------

Second time this has happened in two days. No explanation?

Here's another attempt, without the benefit of the copy that I deleted after the reported 'successful' send.

--------------------

Correct, the same result, with the two visible windows shifted top left.

Your suspicion sounds right on the mark. On Wednesday I'd carefully measured the size  of the 'top left result' as 1022x736. Its position was -2,-2 so 1022+2 = 24 and 736+2+30 for taskbar = 768. But why should the OS do such an odd thing? And to an AR of 4:3? Just as puzzling, where does it gets its info if DDM has been uninstalled?

Here's the diagnostic report as requested.

Diagnostic Report, generated 13/09/18 (10.0.17134)
Copyright (c) 1995-2018, EnTech Taiwan.
Version = 1.40.0.1928
OS = 10.0.17134.2 x64
Mechanism = 3
Account = Standard
Command line = "C:\Program Files (x86)\Dell\Dell Display Manager\ddm.exe"
////////////////////////////////////////
GridType = 0x00000000
GridType.DELA0B9.7MT018430UHS = 0x00000000
GridType.DELA0B9.7MT018430UHS{DB5A122C-A3B5-470C-8C46-923F6607AC34} = 0x00000000
ExtEA.1{DB5A122C-A3B5-470C-8C46-923F6607AC34} = 0x00000000
ExtEA.DELA0B9.7MT018430UHS{DB5A122C-A3B5-470C-8C46-923F6607AC34} = 0x00000000
GridType.1{DB5A122C-A3B5-470C-8C46-923F6607AC34} = 0x00000000
KbFix = 0x00000001
GlassBorder.DELA0B9.7MT018430UHS = 0x00000000
LastCheck = 0x0000A95C
HintShown = 0x00000001
AutoRestoreWindowLayout = 0x00000001
AppScan.DELA0B9.7MT018430UHS = 0x00000004
DELA0B9 = 0x00000001
FW.DELA0B9.7MT018430UHS = 0x00004201
EnumErrorCount = 0x00000000
Metro.DELA0B9.7MT018430UHS = 0x00000001
D3D.DELA0B9.7MT018430UHS = 0x00000004
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Dell\Dell Display Manager\ddm.exe = 0x00000000
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Dell\Dell Display Manager\ddm.d3d = 0x00000004
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Microsoft Office\Root\Office16\OUTLOOK.EXE = 0x00000000
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Microsoft Office\Root\Office16\WINWORD.EXE = 0x00000000
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Microsoft Office\Root\Office16\POWERPNT.EXE = 0x00000001
DELA0B9.7MT018430UHS\C:\Program Files\Waterfox\waterfox.exe = 0x00000001
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Microsoft Office\Root\Office16\EXCEL.EXE = 0x00000000
DELA0B9.7MT018430UHS\C:\Program Files\Windows NT\Accessories\WORDPAD.EXE = 0x00000000
DELA0B9.7MT018430UHS\C:\WINDOWS\system32\mspaint.exe = 0x00000001
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Windows Media Player\wmplayer.exe = 0x00000002
DELA0B9.7MT018430UHS\C:\Program Files\Internet Explorer\IEXPLORE.EXE = 0x00000001
DELA0B9.7MT018430UHS\C:\Program Files (x86)\Adobe\Acrobat Reader DC\Reader\AcroRd32.exe = 0x00000000
DELA0B9.7MT018430UHS\C:\WINDOWS\SysNative\ApplicationFrameHost.exe*Microsoft Edge = 0x00000001
DELA0B9.7MT018430UHS\C:\WINDOWS\SysNative\ApplicationFrameHost.exe = 0x00000001
////////////////////////////////////////
13:58:19.699...Log opened
13:58:19.742...LanguageID = 00000809 00000809 00000809
13:58:19.746...Build = 1.40.0.1928
13:58:19.746...Windows handles = 00020134 000100C6 00010138
13:58:19.746...OS monitor sleep timeout value = 600 ms.
13:58:19.747...Applied DPI = 96-96
13:58:19.747...VM = 0
13:58:19.878...Starting enumeration
13:58:19.944...1. DELA0B9.7MT018430UHS on Intel(R) HD Graphics 530
13:58:19.945......Monitor assignment = 1
13:58:19.945......Adapter name = \\.\DISPLAY1
13:58:19.945......Monitor name = Generic PnP Monitor
13:58:19.946......Vendor ID = 8086
13:58:19.947......GPU driver = igdumdim64 24.20.100.6286
13:58:19.947......Flags = 00000005.00000003
13:58:19.948......Display tag = 2328A5B8
13:58:19.948......Monitor number = 1
13:58:19.948......Monitor handle = 00010001
13:58:19.949......Raw EDID = 00FFFFFFFFFFFF0010ACB9A0534855300E1C0104A53420783A0495A9554D9D26105054A54B00714F8180A940D1C0D100010101010101283C80A070B023403020360006442100001E000000FF00374D543031383433305548530A000000FC0044454C4C2055323431350A2020000000FD00313D1E5311000A2020202020200123
13:58:20.015......VCP10 = 0064004B
13:58:20.015......OS device handle = 00010001.00000000
13:58:20.016......Capabilities string = (prot(monitor)type(lcd)model(u2415)cmds(01 02 03 07 0c e3 f3)vcp(02 04 05 08 10 12 14(04 0b 05 06 08 09 0c) 16 18 1a 52 60(0f 10 11 12) aa(01 02 04) ac ae b2 b6 c6 c8 c9 d6(01 04 05) dc(00 02 03 05) df e0 e1 e2(00 01 02 04 14 19 0c 0d 0f 10 11 13) f0(00 08) f1(01 02) f2 fd)mswhql(1)asset_eep(40)mccs_ver(2.1)) (cached)
13:58:20.246......Configuration = FF0003.FF0062.1C0E
13:58:20.248......Model = Dell U2415
13:58:20.248......Model year = FY15
13:58:20.249......Capabilities = (prot(monitor)type(lcd)model(u2415)cmds(01 02 03 07 0c e3 f3)vcp(02 04 05 08 10 12 14(04 0b 05 06 08 09 0c) 16 18 1a 52 60(0f 10 11 12) aa(01 02 04) ac ae b2 b6 c6 c8 c9 d6(01 04 05) dc(00 02 03 05) df e0 e1 e2(00 01 02 04 14 19 0c 0d 0f 10 11 13) f0(00 08) f1(01 02) f2 fd)mswhql(1)asset_eep(40)mccs_ver(2.1)) (cached)
13:58:20.250......Opcodes supported = 02,04,05,08,10,12,14,16,18,1A,52,60,AA,AC,AE,B2,B6,C6,C8,C9,D6,DC,DF,E0,E1,E2,F0,F1,F2,FD
13:58:20.368......Timing = 74.10 kHz (-), 60.00 Hz (-)
13:58:20.370...Ending enumeration
13:58:20.371...New=DELA0B9.0003
13:58:20.373...Creating VCP table on DELA0B9.7MT018430UHS
13:58:20.431......Opcode 0x12 = 0064004B
13:58:20.539......Opcode 0x60 = 00120010
13:58:20.654......Opcode 0xAA = 00FF0001
13:58:20.773......Opcode 0xC8 = 00111109
13:58:20.880......Opcode 0xE2 = 00190000
13:58:21.165...Video power down timeout = 600
13:58:21.168...Display powered ON
13:58:21.169...User session connect
13:58:21.176...Auto-saving window layout...
14:04:21.630...Refreshing screen object
14:04:22.175...Attempting to auto-restore window layout...
14:04:45.525...Refreshing screen object
14:04:46.032...Attempting to auto-restore window layout...
14:05:36.085...Refreshing screen object
14:05:36.622...Attempting to auto-restore window layout...
14:06:37.964...Old=DELA0B9.0003
14:06:37.966...New=Default_Monitor.0002
14:06:37.966...HPD event detected... pausing
14:06:41.967...Changed display configuration
14:06:41.971...Starting enumeration
14:06:41.973......Skipping unsupported device MONITOR\Default_Monitor\{4d36e96e-e325-11ce-bfc1-08002be10318}\0002
14:06:41.974...Ending enumeration
14:06:41.979...Attempting to auto-restore window layout...
14:12:14.103...Old=Default_Monitor.0002
14:12:14.103...New=
14:12:14.104...HPD event detected... pausing
14:12:18.114...Changed display configuration
14:12:18.118...Starting enumeration
14:12:18.178...1. DELA0B9.7MT018430UHS on Intel(R) HD Graphics 530
14:12:18.178......Monitor assignment = 1
14:12:18.178......Adapter name = \\.\DISPLAY1
14:12:18.178......Monitor name = Generic PnP Monitor
14:12:18.178......Vendor ID = 8086
14:12:18.179......GPU driver = igdumdim64 24.20.100.6286
14:12:18.179......Flags = 00000005.00000003
14:12:18.180......Display tag = 2328A5B8
14:12:18.180......Monitor number = 1
14:12:18.181......Monitor handle = 00010001
14:12:18.181......Raw EDID = 00FFFFFFFFFFFF0010ACB9A0534855300E1C0104A53420783A0495A9554D9D26105054A54B00714F8180A940D1C0D100010101010101283C80A070B023403020360006442100001E000000FF00374D543031383433305548530A000000FC0044454C4C2055323431350A2020000000FD00313D1E5311000A2020202020200123
14:12:18.237......VCP10 = 0064004B
14:12:18.239......OS device handle = 00010001.00000000
14:12:18.239......Capabilities string = (prot(monitor)type(lcd)model(u2415)cmds(01 02 03 07 0c e3 f3)vcp(02 04 05 08 10 12 14(04 0b 05 06 08 09 0c) 16 18 1a 52 60(0f 10 11 12) aa(01 02 04) ac ae b2 b6 c6 c8 c9 d6(01 04 05) dc(00 02 03 05) df e0 e1 e2(00 01 02 04 14 19 0c 0d 0f 10 11 13) f0(00 08) f1(01 02) f2 fd)mswhql(1)asset_eep(40)mccs_ver(2.1)) (cached)
14:12:18.475......Configuration = FF0003.FF0062.1C0E
14:12:18.476......Model = Dell U2415
14:12:18.476......Model year = FY15
14:12:18.476......Capabilities = (prot(monitor)type(lcd)model(u2415)cmds(01 02 03 07 0c e3 f3)vcp(02 04 05 08 10 12 14(04 0b 05 06 08 09 0c) 16 18 1a 52 60(0f 10 11 12) aa(01 02 04) ac ae b2 b6 c6 c8 c9 d6(01 04 05) dc(00 02 03 05) df e0 e1 e2(00 01 02 04 14 19 0c 0d 0f 10 11 13) f0(00 08) f1(01 02) f2 fd)mswhql(1)asset_eep(40)mccs_ver(2.1)) (cached)
14:12:18.476......Opcodes supported = 02,04,05,08,10,12,14,16,18,1A,52,60,AA,AC,AE,B2,B6,C6,C8,C9,D6,DC,DF,E0,E1,E2,F0,F1,F2,FD
14:12:18.580......Timing = Invalid data (0.00 kHz (-), 0.00 Hz (-))
14:12:18.580...Ending enumeration
14:12:18.581...New=DELA0B9.0003
14:12:18.585...Creating VCP table on DELA0B9.7MT018430UHS
14:12:18.653......Opcode 0x12 = 0064004B
14:12:18.775......Opcode 0x60 = 00120010
14:12:18.883......Opcode 0xAA = 00FF0001
14:12:19.006......Opcode 0xC8 = 00111109
14:12:19.120......Opcode 0xE2 = 00190000
14:12:19.560...Attempting to auto-restore window layout...
14:12:38.906...Refreshing screen object
14:12:39.440...Attempting to auto-restore window layout...
14:12:57.654......Error: GetVCPAAh: 0xC0262582.00010001 = An error occurred while transmitting data to the device on the I2C bus
14:12:57.776......Error: GetVCPAAh: 0xC0262582.00010001 = An error occurred while transmitting data to the device on the I2C bus
14:12:58.026......Error: GetVCPAAh: 0xC0262582.00010001 = An error occurred while transmitting data to the device on the I2C bus
14:13:03.230...Refreshing screen object
14:13:03.754...Attempting to auto-restore window layout...
14:57:33.935...Saving window layout...
14:57:48.566...Refreshing screen object
14:57:49.075...Attempting to auto-restore window layout...
14:58:11.266...Saving window layout...
14:58:26.330...Refreshing screen object
14:58:26.851...Attempting to auto-restore window layout...
20:39:20.226...Refreshing Dell U2415 on Intel(R) HD Graphics 530
20:43:12.204...Refreshing screen object
20:45:10.940...\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
20:45:10.940...Dump: complete Windows device enumeration
20:45:10.940...1.DeviceName      = \\.\DISPLAY1
20:45:10.941.....DeviceFlags     = 00000005
20:45:10.941.....DeviceString    = Intel(R) HD Graphics 530
20:45:10.941.....DeviceID        = PCI\VEN_8086&DEV_1912&SUBSYS_86941043&REV_06
20:45:10.942.....DeviceKey       = \Registry\Machine\System\CurrentControlSet\Control\Video\{0D14CDEB-5F25-11E8-8CAA-E3941D19ECE7}\0000
20:45:10.942.....a.MonitorName   = \\.\DISPLAY1\Monitor0
20:45:10.943.......MonitorFlags  = 00000003
20:45:10.943.......MonitorString = Generic PnP Monitor
20:45:10.943.......MonitorID     = MONITOR\DELA0B9\{4d36e96e-e325-11ce-bfc1-08002be10318}\0003
20:45:10.944.......MonitorKey    = \Registry\Machine\System\CurrentControlSet\Control\Class\{4d36e96e-e325-11ce-bfc1-08002be10318}\0003
20:45:10.944.......Raw EDID      = 00FFFFFFFFFFFF0010ACB9A0534855300E1C0104A53420783A0495A9554D9D26105054A54B00714F8180A940D1C0D100010101010101283C80A070B023403020360006442100001E000000FF00374D543031383433305548530A000000FC0044454C4C2055323431350A2020000000FD00313D1E5311000A2020202020200123
20:45:10.945...2.DeviceName      = \\.\DISPLAY2
20:45:10.945.....DeviceFlags     = 00000000
20:45:10.945.....DeviceString    = Intel(R) HD Graphics 530
20:45:10.945.....DeviceID        = PCI\VEN_8086&DEV_1912&SUBSYS_86941043&REV_06
20:45:10.946.....DeviceKey       = \Registry\Machine\System\CurrentControlSet\Control\Video\{0D14CDEB-5F25-11E8-8CAA-E3941D19ECE7}\0001
20:45:10.946...3.DeviceName      = \\.\DISPLAY3
20:45:10.946.....DeviceFlags     = 00000000
20:45:10.947.....DeviceString    = Intel(R) HD Graphics 530
20:45:10.947.....DeviceID        = PCI\VEN_8086&DEV_1912&SUBSYS_86941043&REV_06
20:45:10.947.....DeviceKey       = \Registry\Machine\System\CurrentControlSet\Control\Video\{0D14CDEB-5F25-11E8-8CAA-E3941D19ECE7}\0002
20:45:10.947...Total number of monitors enumerated = 1
20:45:10.948...\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\\
20:45:10.948...Dumping VCP table on DELA0B9.7MT018430UHS
20:45:11.012......Opcode 0x02 = 00020002
20:45:11.135......Opcode 0x10 = 0064004B
20:45:11.258......Opcode 0x12 = 0064004B
20:45:11.388......Opcode 0x14 = 000C0005
20:45:11.502......Opcode 0x16 = 00640064
20:45:11.619......Opcode 0x18 = 00640064
20:45:11.734......Opcode 0x1A = 00640064
20:45:11.850......Opcode 0x52 = 00FF00F2
20:45:11.973......Opcode 0x60 = 00120010
20:45:12.096......Opcode 0xAA = 00FF0001
20:45:12.204......Opcode 0xAC = 00012174
20:45:12.327......Opcode 0xAE = FFFF1770
20:45:12.450......Opcode 0xB2 = 00010001
20:45:12.573......Opcode 0xB6 = 00050003
20:45:12.697......Opcode 0xC6 = FFFF45CC
20:45:12.820......Opcode 0xC8 = 00111109
20:45:12.928......Opcode 0xC9 = FFFF4201
20:45:13.036......Opcode 0xD6 = 00050001
20:45:13.143......Opcode 0xDC = 00050000
20:45:13.266......Opcode 0xDF = FFFF0201
20:45:13.390......Opcode 0xE2 = 00190000
20:45:13.513......Opcode 0xF0 = 00FF0000
20:45:13.636......Opcode 0xF1 = 00FF0003
20:45:13.759......Opcode 0xF2 = 00FF0000
20:45:13.882......Opcode 0xFD = 00FF0062
20:45:13.942......VCP table dumped

terrypin,

missing post, researching.