https://bugs.kde.org/show_bug.cgi?id=505047
Bug ID: 505047
Summary: Display hangs on one external monitor on NVidia/AMD
Optimus laptop
Classification: Plasma
Product: kwin
Version First 6.3.5
Reported In:
Platform: Fedora RPMs
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: wayland-generic
Assignee: kwin-bugs-n...@kde.org
Reporter: misc@lwp.email
Target Milestone: ---
Created attachment 181922
--> https://bugs.kde.org/attachment.cgi?id=181922&action=edit
journalctl log
SUMMARY
>From time to time, the display hangs on one of 2 external monitors connected to
an NVidia/AMD Optimus laptop. The mouse cursor is still moving there, but
nothing else gets draw/updated. Sometimes part of the display starts to
flicker. The only way to fix it, known to me, is kwin_wayland --replace.
Disconnecting and reconnecting the screen makes the whole screen flicker, but
it displays the same image as when the hang happened. The apps are working fine
and KDE is able to move them from the diconnected monitor to the connected one.
Happens most often on a monitor connected through HDMI, but sometimes also on a
monitor connected through USB->DP. Happens most often when using PyCharm, but
not only. Happens maybe once per day.
Happens also on Gnome on Wayland, but much less frequently, and on Gnome
disconnecting and reconnecting the monitor fixes the issue.
STEPS TO REPRODUCE
1. Use the KDE on Wayland on an Optimus Nvidia/KDE laptop with 2 external
screens connected
2. Run PyCharm, work
3. Should happen at some point
OBSERVED RESULT
One screen stops updating.
EXPECTED RESULT
Everything works normally.
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Fedora 42
KDE Plasma Version: 6.3.5
KDE Frameworks Version: 6.14.0
Qt Version: 6.9.0
Kernel: 6.14.8-300
GPU 1: AMD Radeon 780M
GPU 2: Nvidia GeForce RTX 4070 Laptop GPU
Nvidia Driver Version: 570.153.02
ADDITIONAL INFORMATION
I attach journalctl log. The clock on the hung monitor froze at 11:57:43.
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