https://bugs.kde.org/show_bug.cgi?id=511281
Bug ID: 511281
Summary: plasmashell/kwin_wayland 6.5.0 restarting on mouse
move with external monitor plugged in
Classification: Plasma
Product: kwin
Version First 6.5.0
Reported In:
Platform: Other
OS: Linux
Status: REPORTED
Severity: major
Priority: NOR
Component: platform-drm
Assignee: [email protected]
Reporter: [email protected]
CC: [email protected]
Target Milestone: ---
Created attachment 186267
--> https://bugs.kde.org/attachment.cgi?id=186267&action=edit
All output from "startplasma-wayland" launched from tty1 until eventual exit
code 0
SUMMARY
With HDMI/DP external monitor(s) plugged in kwin_wayland 6.5.0 on my Snapdragon
X Elite ARM64 Asus Vivobook S 15 laptop is unusable: everything looks fine on
both monitors without cursor initially if I do nothing, but as soon as I move
the mouse even a bit on the built-in display plasmashell disappears and doesn't
come back until another SDDM relogin/startplasma-wayland invocation while
kwin_wayland is seemingly restarted by kwin_wayland_wrapper.
Sometimes in this second state one frame with the cursor visible on a black
background will be stuck on my built-in display and the I can blindly move it
fine to my HDMI/DP display, until causing kwin_wayland to close/restart if I
try the top-left hot corner. I can only get startplasma-wayland to give up
exiting with code 0 if I make the shell quickly crash 5 times in a row by
moving my mouse about while it's launching. There's no coredumps or dmesg logs
after launching "startplasma-wayland" from a TTY or otherwise.
I already bisected this to
https://invent.kde.org/plasma/kwin/-/commit/ecff9f9467 (backends/drm: remove
the cursor plane from crtcs). There's nothing output to dmesg post-launch but I
could share it too if potentially interesting. Downgrading back to 6.4.5
resolves the issue
With another display I had config as "disable built-in display but keep the
external one" and that also is fine in the currently broken kwin 6.5.0, it's
just the extended/whatever multi-display case which is completely broken.
STEPS TO REPRODUCE
1. Log into Plasma desktop 6.5.0 on an Asus Vivobook S 15 (Snapdragon X Elite)
ARM64 laptop with HDMI (initially or later) plugged in
OBSERVED RESULT
plasmashell & kwin_wayland close on just about any interaction making the mouse
visible/move (specifically on the built-in display?)
EXPECTED RESULT
Everything works just fine with only built-in display or external monitors
plugged in
SOFTWARE/OS VERSIONS
(available in the Info Center app, or by running `kinfo` in a terminal window)
Linux/KDE Plasma: Chimera Linux aarch64
KDE Plasma Version: 6.5.0
KDE Frameworks Version: 6.19.0
Qt Version: 6.10.0
ADDITIONAL INFORMATION
My kernel tree is
https://github.com/SpieringsAE/linux/tree/wip/x1e80100-6.17-rc6 cleanly rebased
on
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/tag/?h=v6.17.5
running https://paste.c-net.org/knyfhwbpghmy as .config if interesting
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