Once I close the lid of my laptop and re-open it, I run into the problem that the built-in screen stays black whenever nothing on the screen is changing. So while I move the mouse on that screen, or type into a textfield on that screen, etc. the screen is active, but as soon as I stop moving the mouse (or in-between hitting keys while typing), the screen will turn off. External monitors continue to work, though re-drawing is lagging occasionally.
The only solution that I have found so far is rebooting. Afterwards, the problem goes away until I close the lid again.
| Field |
Value |
| Hardware model |
FUJITSU CLIENT COMPUTING LIMITED LIFEBOOK U7411 |
| Memory |
32.0 GiB |
| CPU |
11th Gen Intel® Core™ i5-1135G7 @ 2.40GHz × 8 |
| GPU |
Mesa Intel® Xe Graphics (TGL GT2) |
| Hard-drive capacity |
512.1 GB |
| Operating system |
Ubuntu 22.04.2 2023.03.17 LTS (Cubic 2023-03-17 10:05) |
| Operating system type |
64 bit |
| GNOME version |
42.5 |
| Window manager |
Wayland |
Added later
A friend recommended restarting the display manager which I did with
sudo systemctl restart display-manager.
This led to a crash with the following error messages:
[84660.183834] i915 000:00:02.0: [drm] *ERROR* Failed to write source OUI
[84664.899344] i915 000:00:02.0: [drm] *ERROR* [ENCODER:307:DDI A/PHY A] [DPRX] Failed to enable link training
[84668.400493] i915 000:00:02.0: [drm] *ERROR* Failed to read DPCD register 0x92
(and many more repetitions of these with different numbers in front).
I have seen similar errors when restarting the system after having the problem before.
