https://bugs.kde.org/show_bug.cgi?id=519914
Bug ID: 519914
Summary: Wayland crash on host virtio (qemu/kvm) and guest Neon
with Mesa 25.2.8 (llvmpipe)
Classification: I don't know
Product: kde
Version First unspecified
Reported In:
Platform: Neon
OS: Linux
Status: REPORTED
Severity: crash
Priority: NOR
Component: general
Assignee: [email protected]
Reporter: [email protected]
Target Milestone: ---
Created attachment 192130
--> https://bugs.kde.org/attachment.cgi?id=192130&action=edit
Crash log with Mesa 25.2.8
DESCRIPTION
The problem occurred after this commit in kwin-wayland
(https://invent.kde.org/plasma/kwin/-/merge_requests/8913/diffs?commit_id=23ded4abaee9ffc0459282be2e07238285f9f37e).
If I launch KDE Neon as a guest OS, and I have the virtio video driver selected
in QEMU/KVM, Wayland crashes (black screen, several attempts, and then throws
it back into the DM).
But it works in X11, or if I select VGA driver instead of virtio.
If I upgrade Mesa from PPA to 25.3.6 or 26.x, then the problem goes away.
So, after this commit, either some bug came out in Mesa 25.2.8, or there was
some kind of regression in Kwin itself.
I am attaching the crash log on 25.2.8 and the successful log from 25.3.6.
STEPS TO REPRODUCE
1. Download latest KDE Neon Unstable ISO
2. Create new VM (QEMU/KVM) with virtio driver
3. Launch Live CD from ISO
OBSERVED RESULT
Black screen, wayland crash
EXPECTED RESULT
The wayland session should load and Plasma should work
SOFTWARE/OS VERSIONS
Operating System: KDE neon Unstable Edition
KDE Plasma Version: 6.6.80
KDE Frameworks Version: 6.27.0
Qt Version: 6.10.2
Kernel Version: 6.17.0-23-generic (64-bit)
Graphics Processor: llvmpipe
--
You are receiving this mail because:
You are watching all bug changes.
