https://bugs.kde.org/show_bug.cgi?id=485827
Bug ID: 485827
Summary: Virtio VM has upside down cursor after kwin 6.0.4
Classification: Plasma
Product: kwin
Version: 6.0.4
Platform: Solus
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: platform-drm
Assignee: kwin-bugs-n...@kde.org
Reporter: site....@reillybrogan.com
Target Milestone: ---
Created attachment 168702
--> https://bugs.kde.org/attachment.cgi?id=168702&action=edit
Log from boot with the upside down cursor
SUMMARY
I updated Plasma on Solus to v6.0.4 and noticed that virt-manager VMs using
VirGL/Virtio for the GPU had upside down and offset cursors. The issue affects
both Plasma Wayland session and SDDM when using kwin and using Wayland.
I bisected it to commit 6e4fae02c3d066311ccecfb74d3f2da52d019c86
(https://invent.kde.org/plasma/kwin/-/commit/6e4fae02c3d066311ccecfb74d3f2da52d019c86).
When a revert is applied to 6.0.4 the issue goes away.
The issue does not appear when using the QXL GPU type.
STEPS TO REPRODUCE
1. Update existing VM to Plasma 6.0.4, with kernel 6.8 (needs this commit:
https://github.com/gregkh/linux/commit/9724ed6c1b1212d138e63f5e80647dc8b6b86696,
present it v6.8 and later)
2. Reboot
OBSERVED RESULT
Cursor is upside down and offset
EXPECTED RESULT
Cursor is normal
SOFTWARE/OS VERSIONS
KDE Plasma Version: v6.0.4
KDE Frameworks Version: v6.1.0
Qt Version: v6.6.3
Mesa: v24.0.5 (LLVM v16.0.6)
Kernel: v6.8.7
Virglrenderer: v1.0.1
ADDITIONAL INFORMATION
See attached for kwin debug log for the "bad" boot as well as the log after
reverting the commit. These logs are from kwin running in SDDM. Interestingly
if I log into the Wayland session I see the following in the kwin logs:
Apr 19 19:37:52 solus-plasma kwin_wayland[1058]: Virtual Machine:
no
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