https://bugs.kde.org/show_bug.cgi?id=431858
Bug ID: 431858
Summary: Composition turning off every time secondary screen is
plugged in or unplugged
Product: kwin
Version: 5.20.5
Platform: Manjaro
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: compositing
Assignee: kwin-bugs-n...@kde.org
Reporter: michal.dybc...@gmail.com
Target Milestone: ---
Created attachment 135022
--> https://bugs.kde.org/attachment.cgi?id=135022&action=edit
journald.log
SUMMARY
When plugging in a secondary screen composition is turned off, so I have to
bring it back with shift+alt+f12. The same is happening when I unplug the
monitor.
It doesn't happen all the time but in 99%. Unplugging has a higher chance that
the composition will stay, but in general, it also causes it to stop working.
STEPS TO REPRODUCE
1. Have composition on.
2. Plug in a secondary monitor.
OBSERVED RESULT
Composition is turned off.
EXPECTED RESULT
Plugging a secondary monitor or unplugging it shouldn't turn off composition
when we don't want it.
SOFTWARE/OS VERSIONS
Operating System: Manjaro Linux
KDE Plasma Version: 5.20.5
KDE Frameworks Version: 5.78.0
Qt Version: 5.15.2
Kernel Version: 5.9.16-1-MANJARO
OS Type: 64-bit
Processors: 8 × Intel® Core™ i7-6700HQ CPU @ 2.60GHz
Memory: 7.6 GiB of RAM
Graphics Processor: Mesa Intel® HD Graphics 530
ADDITIONAL INFORMATION
It's a hybrid laptop with optimus-manager. It happens on Intel Modesetting
drivers, but also on Hybrid mode as well. Since Hybrid works, I don't use
Nvidia mode enough to provide info if this bug happens there as well.
OS: Manjaro KDE, testing branch.
Since I use a laptop but work remotely almost every day, I constantly and on a
daily basis plug the secondary monitor on and off. This bug is very disturbing.
The composition is turning off also on system boot when the secondary monitor
is working, not always but in 90% of time.
Initially I thought this to be a latte bug, so I switched to a default, testing
user, without latte running, with the default Plasma panel. The same happens
there.
I observe this bug for over a year, but recently it became a bigger annoyance
because I use a secondary monitor all the time for work.
I'm sending a journald log of the plug in-off events. I hope it will help. If
something more is needed, let me know.
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