SUMMARY I tried VIrtualBox + Plasma Wayland on neon-unstable-20231001-1120, after doing 'apt udpate && apt dist-upgrade' the Wayland session did not even start. After several flickers between VirtualBox screen sizes, it went back to the SDDM login screen. Syslog showed segfaults. STEPS TO REPRODUCE 1. Install KDE Neon Unstable to VirtualBox, enable 3d acceleration, install Guest Additions 2. apt udpate && apt dist-upgrade 3. apt install plasma-workspace-wayland 4. At login, select Plasma (Wayland) and log in OBSERVED RESULT VirtualBox window changes size several times, but stays black EXPECTED RESULT Wayland session starts SOFTWARE/OS VERSIONS Linux/KDE Plasma: KDE Neon Unstable KDE Plasma Version: Plasma 6
Created attachment 162179 [details] Syslog during the Wayland startup crash
Please get a backtrace for kwin with > coredumpctl debug kwin_wayland --debugger-arguments="-ex bt" and attach it here
Created attachment 162195 [details] Backtrace from coredumpctl Taken dump with the follwing command > sudo coredumpctl debug kwin_wayland --debugger-arguments="-ex bt" |tee kwin_wayland_crash_plasma6.txt
A possibly relevant merge request was started @ https://invent.kde.org/plasma/kwin/-/merge_requests/4490
I have the same behavior. It's interesting fact, that is on Intel UHD laptop it works fine, but with desktop powered AMD gpu is not.
Git commit aaffd459cede4a3f3a4119be9d7038b9beec1793 by Xaver Hugl. Committed on 11/10/2023 at 12:42. Pushed by zamundaaa into branch 'master'. backends/drm: add more nullptr checks for m_surface M +11 -3 src/backends/drm/drm_egl_layer_surface.cpp https://invent.kde.org/plasma/kwin/-/commit/aaffd459cede4a3f3a4119be9d7038b9beec1793