Score:0

Missing monitor content after locking a screen except coursor

fr flag

I use on Thinkpad two external monitors, one is connected with HDMI, one is with DP -> USB-C. While the first one is working correctly, a second one behaves in a strange way after locking a computer.

When I'm leaving the computer in the office I use Windows+L to lock user account. In 90% cases when I come back I wake up the laptop and all monitors are working fine. In 10% cases I can see black screen on the second monitor. In Settings -> Displays I can see all monitors correctly set up and when I move mouse on the second monitor I can see it - I also see I'm hovering over the text box as the cursor changes to text type, so looks like the content is there. The only question - why it's all black then and not visibile?

Current workaround is to restart a system, but for obvious reasons I'd like to find another way.

What I tried is to restart GNOME (ALT+F2, then r command) and disable energy saving mode.

Score:0
fr flag

For future users, I think I fixed this issue by downgrade NVidia drivers and then reupgrading it.

Access to the drivers can be managed by Software & Updates in Ubuntu's default settings (can be reached by pressing Super key - which is usually a Windows key on the keyboard and typing Software & Updates - it should narrow amount of possible apps to this one only).

Then you need to navigate to Additional drivers tab, where by default I got listed all Drivers for my NVIDIA graphic card. I tried to install different ones (by selecting on the list and click Apply Changes button) but looks like nvidia-driver-460 seems to be working.

Consider sudo apt upgrade anyway, always good to try

stumblebee avatar
mx flag
While this answer may provide a solution to the problem, It lacks instructions on how to fix the the problem. Please consider including more details.
Michal avatar
fr flag
Good point @stumblebee, I've edited a comment
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