Dear topic readers, Hi folks, Last days I've spent some time setting up my 3 Dell U2414H's in Daisy Chain / MST mode. I've had the same issues as people in this topic: U2414H DisplayPort Daisy Chain/MST Resolution Issue. For me it turns out the monitors weren't detected correctly, so Windows uses a 'Default Monitor', however, for some reason, this monitor will be set to a resolution of 1600x1200, this causes the U2414H to turn into 'power saving' mode because it can't handle the -too- high resolution. Ive managed to fix this problem by changing the resolution of the 'Default Monitor' from 1600x1200 to 1920x1080. Below the workaround that I've used to get my configuration working. Sorry for my lack of English, my native language is Dutch. IMPORTANT NOTE: The workaround below contains Windows Registry mods and can serious damage your PC!Only apply this workaround when you really know what you're doing!Neither Dell, nor I are responsible if you're messing up your PC! First of all, we need to make some system changes to Windows, so we must run every program we need in Administrator mode. 1) Click the Windows orb (a.k.a. Start Button) and type cmd, then Right click the cmd.exe result and select [Run as Administrator] Now we're gonna use some 'Easter Eggs' in Windows. Lets's tell Windows to show it's 'disconnected' Devices. 2) Enter the following commands and press [Enter] after every command > set devmgr_show_nonpresent_devices=1> devmgmt.msc Don't close this window. Windows device manager will be started but the 'disconnected' devices are not visible yet, to fix this, take the following steps: 3) Click [View] followed by [Show hidden devices], so this item will show a checkmark. 4) Open the [Monitors] section, this is possibly a mess, like this As you can see, there are (possibly) a lot of hidden [Generic Non-PnP Monitor] entries. IMPORTANT NOTE: Other guides on the internet describe to remove ALL hidden entries, here's my advise:DON'T! Please read on to see why. Now we have confirmed that Windows was not able to setup (every) screen correctly, we're gonna tell Windows to apply the right settings, next time it doesn't recognize the monitor(s). 5) Switch back to the elevated command window and enter the following command: > regedit 6) The Windows registery editor will be started, find the following key: HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Enum\DISPLAY\Default_Monitor This entry contains one or more sub entries with a long number as name: Keep the regedit window open and switch back to the device manager window, position the windows aside to see wat happens. Start removing the hidden [Generic Non-PnP Monitor] entries in device manager one-by-one, you'll see that the child entries from [Default_Monitor] in regedit are also disappearing (Maybe you have to focus the regedit window and press F5 to refresh the entries manually).Repeat this step until you have only one entry remaining, if available the only connected and visible [Generic Non-PnP Monitor]. It's important to keep at least one [Generic non-PnP Monitor] to make sure Windows will communicate to the monitor(s) at the right resolution to prevent the monitor to go into 'power saving' mode. 7) Switch to the regedit window and open the [DeviceParameters] entry of the (first and only) [Default_Monitor] child entry As you can see, there is a key named BAD_EDID, so, if Windows is not able to get the monitor's EDID, it will fall back to this entry. Now, take a look at the [Device Parameters] key. There can be two situations (8A or 8B) 8A) The (grand)child entry is named the wrong resolution, e.g. 1600,1200, we have to rename it. Right click the entry with the wrong resolution, e.g. 1600,1200 and click [Rename].Now change the name to 1920,1080 8B) There is no child entry, so we have to create it Right click the [Device Parameters] entry, click [New] followed by [Key].Now enter the name MODES. Richt click the created [Modes] entry, click [New] followed by [Key] and enter the name 1920,1080. If you have alreay some DELAXXX entries, make sure that every entry with the wrong resolution is changed to the right one: 1920,1080 OK, That's it. Let's see if it worked Now try to turn your displays on and off (in different order) and try to restart your PC (multiple times). In my case, with 3 U2414H's in Daisy Chain mode my results are: 09) Device manager: 10) Windows display setup: 11) Intel DisplayPort topology (sorry it's in Dutch) 12) Regedit Good to know: Make sure the last monitor in the Daisy Chain is set to DisplayPort 1.2: OFF! Also good to know: There is a possibility that you will see more entries aside of [Default_Monitor] and [DELA0A3]. According to the Dell display driver, this are the enumerations used by Dell: HDMI1 - DELA0A4HDMI2 - DELA0B2DisplayPort - DELA0A2miniDisplayPort - DELA0A3 So if you have connected your monitor another way, you will see entries of this connection as well. When using another input port on your monitor to configure your DisplayPort (DaisyChain, MST) setup, make sure to unplug this port before entering DisplayPort mode. It look likes the monitor is reporting the same ID on all ports, so Windows can be confused when it detects the same ID on both DP as e.g. HDMI. Conclusion This is what worked for me. I hope to help you people by sharing this experience and maybe some Dell technicians can use this information to reproduce the problem and fix it permanently.. Regards, Matthijs de Ridder, Netherlandsa.k.a. mastermattie

‎U2414H DisplayPort Daisy Chain / MST Resolution: How I fxed it (workaround)!

Responses(32)
Solutions(0)

mastermattie

16 Posts

0

August 12th, 2014 04:00

No, it's an issue while daisy chaining with DisplayPort. As far as I know, HDMI does not support daisy chaining (correct me if I'm wrong).

Ba10s118

3 Posts

0

August 12th, 2014 05:00

I know about the issue in Daisy-chain, I've experienced the same.

But I'm a live streamer, so I use a capture card, and thereby I've moved to HDMI.

But the monitor that run through the HDMI splitter, do never enter Power Saving Mode.

So to test if this works, I've bought 2 extra HDMI splitters, and they will receive in the mail tomorrow.

JungerC

1 Message

0

August 18th, 2014 08:00

Matthijs,

Does this workaround also fix the limited rang RBG issue? Or is that not an issue with the Intel HD graphics?

I currently have 1 2414h, and I have an Nvidia card and I'm using the Nvidia toggle fix. I'd like to get 2 more and use the DP chain.

mastermattie

16 Posts

0

August 29th, 2014 23:00

Hi Jungerc,

To be honest, I didn't look after the RGB issue. I only used the method described to fix the "going into power saving mode" issue..

So I'm not not sure if this is also fixed by the method described.

fl0riandre

1 Message

0

September 1st, 2014 08:00

Many thanks for this workaround!

it conduce me to install the monitor driver as windows don't detect it correctly...

http://www.dell.com/support/drivers/us/en/19/driverdetails?driverid=YVPMR

My daisy chain is working perfectly now, so i can finally work without disruptions :-)

RetubeCo

1 Message

0

September 15th, 2014 09:00

The owner of my company has a Microsoft Surface Pro 3 that I need to provide a "reliable" method of dual monitors and I would love to purchase two of these Dell U2414H monitors to daisychain in MST displayport mode, but I don't want to be a programmer in order to do so.

Would be nice if Dell can acknowledge a "fix" or update to this issue, and then I'll give it a shot. I'd like an out-of-the-box solution that actually works.

tangcla

14 Posts

0

September 23rd, 2014 18:00

Many thanks for this workaround!

it conduce me to install the monitor driver as windows don't detect it correctly...

http://www.dell.com/support/drivers/us/en/19/driverdetails?driverid=YVPMR

My daisy chain is

I installed the driver and I still have occasions where the displays will go to power save mode.

I'll have to try the Power settings (from balanced to high performance mode in Control Panel) when I get home.

K

kurtisscott

1 Message

0

December 11th, 2014 07:00

Thanks mastermattie. I don't know about the other people replying to this forum, but this worked perfectly. I have a dell computer with the stock intel drivers and this was still happening to me. I don't even have them daisy chained, just hooked up on 2 different displayport ports. Anyway, thanks a bunch.

Kurtis

elshmed

1 Message

0

February 17th, 2015 16:00

I'm having the exact same issue with both my 2414h on display port. I also have an amd card and your override trick did it for m so far. I wasn't as lucky with the registry trick though.

wstahlm

1 Message

0

March 9th, 2015 13:00

What should you do if you accidentally delete all the Generic PnP Monitor Keys?

charlie3061

1 Message

0

May 1st, 2015 11:00

Thanks for this very detailed explanation. My problem is slightly different, but you may have an idea what I should do. I am trying to daisy chain 3 Dell U2414H monitors. Only number 1 and 2 are recognized, number 3 is just a mirror of number 2. I tried to see if it shows up as 'hidden' as you described in device mgr, but there are only two monitors. So I don't know what's wrong. I did wonder about one of your last comments "Make sure the last monitor in the Daisy Chain is set to DisplayPort 1.2: OFF!" I understand what you mean, but not how to do this. On the monitor there is a menu with a setting "displayport 1.2" that can be enabled or disabled, is that what you are referring to? Either way that didn't make the third monitor work, whether this option is enabled or disabled. I am connecting to a Lenovo T440P with Intel 6400 graphics. Any suggestion what else I should do? BTW, as a fellow Dutchman I can assure you that your English is fine!

mastermattie

16 Posts

0

September 25th, 2015 00:00

Hi wstahlm,

See, if you get picture with DisplayPort 1.2 setting disabled. If that fails, try to boot Windows into Safe Mode and find the reffered keys in the register. It's probably set to 1600x1200 try to change it to 1920x1080 and see if you've got picture after a normal boot.

mastermattie

16 Posts

0

September 25th, 2015 00:00

Sorry, the last posty was a reply to wstahlm's question.

mastermattie

16 Posts

0

September 25th, 2015 00:00

Hi charlie3061, sorry, i just didn't see your question anymore. But yes, With DisplayPort 1.2: OFF I ment to disable it in the monitor's menu.

wakaguaka

9 Posts

0

February 10th, 2016 15:00

Thank you for taking time to make this post!
This fixed the messy resolution when my computer goes in idle mode too (P2715Q)

Conclusion

This is what worked for me. I hope to help you people by sharing this experience and maybe some Dell technicians can use this information to reproduce the problem and fix it permanently..

Regards,

Matthijs de Ridder, Netherlands
a.k.a. mastermattie

Very helpful!

1
2
3

View All

No Events found!

Monitors

Was this post helpful?