https://bugs.kde.org/show_bug.cgi?id=484527
Bug ID: 484527
Summary: Sleep(suspend to ram) breaks the system under specific
conditions
Classification: Plasma
Product: kwin
Version: 6.0.2
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: andreas@schaarschmidt.world
Target Milestone: ---
Created attachment 167796
--> https://bugs.kde.org/attachment.cgi?id=167796&action=edit
Screenshot
SUMMARY
On my laptop the system (kwin?) will sometimes break when going to sleep by
closing the laptop lid and resuming under specific conditions: with an disabled
external monitor attached via docking-station.
This does not happen reliably, I had to try several(3-4) times to reproduce it.
It never seems to happen when using the sleep button from the start menu, or
when the external monitor is connected directly to the HDMI port of the laptop,
the docking station seems to be a critical component.
STEPS TO REPRODUCE
1. In energy settings configure: When laptop lid is closed: Sleep; When sleep
enter: Standby(suspend to ram)
2. Attach a docking station with one or more external displays connected
3. Disable the external displays in the display configuration
4. Close the laptop lid, wait a bit and reopen it
5. Repeat 4. if necessary
OBSERVED RESULT
The system resumes and is responsive, apps open but the KDE desktop only shows
a black screen. Some of the hotkeys still work, including the meta key to open
the start menu. See attached screenshot.
EXPECTED RESULT
The system should resume normally, and the desktop should not show a black
screen.
SOFTWARE/OS VERSIONS
Platform: EndeavourOS
KDE Plasma Version: 6.0.2-3
ADDITIONAL INFORMATION
AMD Ryzen 7840U with 740M integrated graphics, no dGPU
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