https://bugs.kde.org/show_bug.cgi?id=477738
Bug ID: 477738
Summary: kwin on Wayland black screen with cursor after most
resume-from-RAM
Classification: Plasma
Product: kwin
Version: 5.27.9
Platform: Arch Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: etnguyen03+kdeb...@gmail.com
Target Milestone: ---
SUMMARY
After I suspend to RAM and resume, my KDE setup (Wayland, Nvidia 1060, using
the nvidia driver, on Arch Linux) leaves me with a black screen and a working
cursor that changes when I hover over a textbox (but I can't see the textbox)
on the lockscreen.
I see this in the system journal right after I resume from RAM:
```
kwin_wayland[1399]: kwin_wayland_drm: Atomic commit failed! Permission denied
kwin_wayland[1399]: kwin_wayland_drm: Presentation failed! Permission denied
kwin_wayland[1399]: kwin_wayland_drm: Atomic commit failed! Permission denied
kwin_wayland[1399]: kwin_wayland_drm: Presentation failed! Permission denied
kwin_wayland[1399]: kwin_wayland_drm: Atomic modeset commit failed! Permission
denied
kwin_wayland[1399]: kwin_wayland_drm: Setting dpms mode failed!
kwin_wayland[1399]: kwin_wayland_drm: Atomic modeset commit failed! Permission
denied
kwin_wayland[1399]: kwin_wayland_drm: Setting dpms mode failed!
kwin_wayland[1399]: kwin_core: Could not find window with uuid
"{38667f04-f9ad-4cc3-958b-f8d804def467}"
kwin_wayland[1399]: kwin_core: Could not find window with uuid
"{38667f04-f9ad-4cc3-958b-f8d804def467}"
kwin_wayland[1399]: kwin_core: Could not find window with uuid
"{38667f04-f9ad-4cc3-958b-f8d804def467}"
kwin_wayland[1399]: kwin_core: Could not find window with uuid
"{38667f04-f9ad-4cc3-958b-f8d804def467}"
```
and then lots of these lines, filling up my journal until I reboot
```
kwin_core: Applying KScreen config failed!
```
I can't seem to find a way to recover from this other than to reboot, which is,
of course, extremely disruptive.
STEPS TO REPRODUCE
1. Put the computer to sleep (i.e. suspend to RAM)
2. Wake it back up
OBSERVED RESULT
Black screen -- no lock screen displayed, but I can still move my mouse cursor
around and see it respond to the presence of a text box
EXPECTED RESULT
I should be able to see my lock screen.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux, latest packages
(available in About System)
KDE Plasma Version: 5.27.9
KDE Frameworks Version: 5.112.0
Qt Version: 5.15.11
ADDITIONAL INFORMATION
My hardware (Nvidia 1060, nvidia proprietary driver) is probably relevant? Not
quite sure how to attach bugtraces, but I can if needed. Thank you!
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