https://bugs.kde.org/show_bug.cgi?id=512707
Bug ID: 512707
Summary: KDE Linux - kwin crashes on login with libvirt VM
Classification: Plasma
Product: kwin
Version First unspecified
Reported In:
Platform: KDE Linux
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: wayland-generic
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Created attachment 187221
--> https://bugs.kde.org/attachment.cgi?id=187221&action=edit
kwin crash log
SUMMARY
Logging into KDE Linux on libvirt VM causes kwin to crash.
STEPS TO REPRODUCE
1. Create a libvirt VM and install KDE Linux.
2. Setup GPU passthrough.
3. Login to KDE Plasma.
OBSERVED RESULT
kwin crashes shortly after login. A couple of crash windows appear before
getting kicked back to the login screen.
EXPECTED RESULT
kwin does not crash and the desktop session remains.
SOFTWARE/OS VERSIONS
Operating System: KDE Linux 2025-11-27
KDE Plasma Version: 6.5.80
KDE Frameworks Version: 6.21.0
Qt Version: 6.10.0
Kernel Version: 6.17.8-arch1-1 (64-bit)
Graphics Platform: offscreen
Processors: 2 × AMD Phenom(tm) II X4 965 Processor
Memory: 4 GiB of RAM (3.8 GiB usable)
ADDITIONAL INFORMATION
KDE Linux builds 202511270254 and 202511220923 both crash. I have not tried
builds between those. 202511180408 does not crash.
I have a crash log but I do not have debugging symbols installed. If someone
could provide instructions, I could install the debugging symbols and recreate
the issue since it happens on every login.
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