Which Latitude systems the docks are connected and what are the monitor models?

For us, we think the problem is on the 24xx monitors.  We arent positive though.  We think this started with December updates whether with the regular software updates or via store style updates.

@DELL-Jesse L​ Hi there are a few varieties, but mostly Latitude 5540 connected to P2421 - P2425H screens

@eobiont2​ Sounds about right. All we have is P24X range of monitors.

Are you thinking dock updates, or the laptop updates in general? We only use dell command update, manual updates are blocked, as is the store.

One user in particular we swapped out the display port cables and it fixed it. I know there are different variations of DP cables, but surely this wouldnt affect the monitors just coming out of sleep (in fact its not even sleep, its just "turn monitor off" after 15 mins). And they have had the same setup and cables for a few years so something recently has changed

@AlexInnes​ 

Some requested information.

• Ensure that they have the latest system and dock drivers installed.
• If possible share the issue video  for our engineering team to review.
• You can can hit “I have this problem too”.

Okay it seems we have different issues with different users... but all stemming from Nov/Dec so i still stay its the dock firmware updates

Latest "fix" one user is using a precision 7770 with DC19DCS and had 3 old U2412M screens. Hes had the screens for over 12 years, and other than them (all 3...) not waking after the power saver kicks in (just screens going off, not sleep or hibernate), they still work fine.

We just temporarily swapped them out with 3 newer screens and the problem disappeared. plug in his old ones... problem returns.

Connect those old monitors direct to the laptop via USB-C adaptor or HDMI... no issue.

So its the dock. I am thinking that the more recent dock firmwares have made fixes for other things, but it has broken compatibility with his old screens (both are DP 1.2 so cant be that) I doubt Dell test to see if updates affect 12 year old equipment.

Unfortunately there is no information on the dock firmware page as to what the update was for, other than generic "fixes issues"

But yet other users with the same issue have newer monitors (the same as the newer ones I tested on the above) so my brain is fried.

Its the dock though..........

I am having this same issue with a Dell Latitude 5440 dock. It started around November or December as well. I have two ViewSonic monitors plugged into the dock and they won't wake up after leaving the computer for a while. The solution is unplugging and plugging back in again the USB-c dock connector from the laptop. As the OP has said, this is not an acceptable solution. IT here has tried updating the dock firmware, BIOS, reloading all drivers, they even replaced my dock and the problem went away for about a day, but now it's back. Dell please do some testing. One of your updated broke this dock!

same problem as other users...i'm using a latitude 5420, win11 pr 25h2, wd19tb docking station, 2 dell u2212hm monitors connected via display port. if it matters, i am using a 4 port kvm switch, with one dp to dvi cable to kvm, and the direct DP to DP cable for the 2nd monitor. But as the earlier posters commented this all worked well until about 2 or 3 months ago. i have to remove the usb c connector and reconnect to restore. checking for latest firmware, i have the latest according to the website, and when i run the dell firmware update utility from 6Jan, the current version and the newer versions displayed are all the same...WD19TB MST=05.07.08, Gen1 Hub=01.23, Gen2 Hub=01.62, WD19TB Dock NVM=60.00, WD19TB Dock Ec=01.01.00.15

another example
Dell Latitude 5430 on Win11
Dell Dock WD19S

2 Dell U2412M
w/ Display port cables
Dell Command Update tweaked to maximize all types and bios and executed so up to date
monitors not waking still an issue

Okay through trial and error, and the helpful feedback from others on this forum…. U2412m is the culprit

it seems 95% of our affected users are using U2412m monitors through either WD19/WD19/WD19S/WD19DCS

an affected user was swapped over to new P2425H screens, BOOM, problem gone. Plug his U2412m back in… problem returns

so it is caused by the dock update…. But are those particular monitors affected simply because of their age, or because of their 1920 x 1200 resolution? 

i have ordered him the P2425 as 1920 x 1200 is essential (according to him 😒) so will see next week if this fixes it.

@eobiont2​ 

is that U24xx? U2412m is the culprit for us

swapped user to P2425h and it fixed. Put the U2412 back in, problem returns

Until I get a brand new screen that is 1920 x 1200, I can’t prove if it’s just the age of the monitor that’s the problem and the recent dock update has stopped something from

working, or whether the dock update has affected multiple screens running at the 1200 resolution

try swapping out the monitor if you can as a test 

@pcwilliams07​ @Chad AA​ 

U2412m is the culprit for us

swapped user to P2425h and it fixed. Put the U2412 back in, problem returns

Until I get a brand new screen that is 1920 x 1200, I can’t prove if it’s just the age of the monitor that’s the problem and the recent dock update has stopped something from

working, or whether the dock update has affected multiple screens running at the 1200 resolution

try swapping out the monitor if you can as a test 

@AlexInnes 

I have seen other user threads posting issues with the 2012 released U2412M trying to run in not supported Windows 11.

Curious. Do your U2412M have this same dock issue on Latitude still running Windows 10?

@AlexInnes​ yes - for us u2412M. also - the problem for us is not only if the monitor is WD19 connected, we also have reports of this problem when that monitor is attached as a second to  Optiplex AIO.

@DELL-ChrisM2​ 

sorry not sure as we are 100% win11