Laptops General - Read Only

[BlackRisport]

Hi All, 

The IT department for my company has purchased multiple E7440s to test before deploying to the rest of the company. Unfortunately most of us are having issues when they are plugged into port replicators. 

After a brief search online it seems that we are not the only ones to experience these issues:

http://forum.notebookreview.com/dell-latitude-vostro-precision/718952-latitude-e7240-e7440-leaked-12...

Is anyone else experiencing this 

AND is there a fix yet?

[au_aaron]

Yep, having the same issues with E7420 and E7440 laptops.

https://www.youtube.com/watch?v=RGEilUAuHPA

I have heard using DisplayPort cables stops it but annoying.

Have had it both happen on DSUB and DVI cables. DSUB doesn't seem to get the wavy pixel dance - it just turns the screen black for a second then it comes back.

Only happens when docked on external displays - Have not tried anything else - I run two external monitors both DVI and it does it on both monitors at different times. Have tried using a DVI-DisplayPort adapter but still happens.

[au_aaron]

Fixed Youtube Link

https://www.youtube.com/watch?v=HAqVVN6HLGk

[tony251]

I have the same issue "wavy pixel dance", with E7240 and advanced port replicator with VGA/DVI cables. very strange.

[Carney1]

Same issue here on multiple E7440s here, and multiple docking stations (Dell E-Port Plus, VM8F7).  The laptops are docked with two DVI connections.  

Every 15 seconds to 2 minutes (and randomly in between) either screen will have a brief moment of fine-distortion like a one-pixel shift on every other line, followed by the display blacking out for one second.  

It happens randomly on either of two displays, on each E7440 we have.

Specs:

E7440, Windows 8.1 Pro, VM8F7 Dock, 2x Samsung SyncMaster 2343BWX @ 2048 x 1152.

Happens exactly like this video, every minute or two:

http://www.youtube.com/watch?v=HAqVVN6HLGk

[Carney1]

Update....

The original driver from the last post was:

Intel Corporation

10/1/2013

10.18.10.3316

After updating to:

Intel Corporation

12/18/2013

10.18.10.3379

...the issue is much less common.  Every 5-10 minutes instead of every 15 seconds.  Looking for a changelog or something for the driver, but it seems they must be aware of it (or accidentally made it somewhat better.)

[1TGuy]

Hi, we just began ordering the E7440 models and we're having the same issue. So far I have tested it with DVI and DisplayPort and it only happens with DVI port/cable. It does not occur when using the laptop display, only when docked.

I have a ticket open with Dell and they're scheduling an on-site tech to come out and take a look. Let me know if you guys have an update.

[Carney1]

Same deal here... laptop display is fine.  Screens are still having this issue, DVI tested so far.  Have been trying different (non native to the display) resolutions with no luck.  Driver seemed to have had some effect, but it's still WAY to often.  Every couple of minutes.

Curious to see what the tech has to say, but this definitely seems model-wide and not specific to certain machines.  All of our E7440s do it.  

Previous models (ie: E6520, etc) do not have any issue with the same docs and screens.

[tony251]

After installing the intel driver: 10.18.10.3345, it seems much less frequent, though still monitoring it.

[SBaugh]

Is this the fix?  I'm applying it now, but it is taking quite a while.

http://www.dell.com/support/drivers/us/en/19/DriverDetails/Product/latitude-e7440-ultrabook?driverId...

Fixes & Enhancements

Firmware update to fix flickering screen seen on external monitors attached to dock.

NOTE: For E7440/E7240 only, this update applies when using a dock. If your configuration does not include a dock, the update is not for you and will fail to install

-Scott Baugh