https://bugs.kde.org/show_bug.cgi?id=481374
Bug ID: 481374
Summary: Graphics performance in QEMU/KVM guest with virGL is
bad (Qt 6.7)
Classification: I don't know
Product: kde
Version: unspecified
Platform: Other
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: general
Assignee: unassigned-b...@kde.org
Reporter: rune.fritzs...@web.de
Target Milestone: ---
In a VM using QEMU/KVM, Spice and virGL, graphics performance is very bad with
Plasma 6 RC 2 installed. This was tested using Arch Linux - without the
KDE-unstable Repo enabled, performance is fine (around 120FPS in glxgears);
with the repo enabled and thus Plasma 6 RC 2 installed, graphics performance is
very bad (20FPS in glxgears). This is very evident in desktop use, not just
with 3D-applications.
STEPS TO REPRODUCE
1. Install an Arch Linux guest in a QEMU/KVM VM
2. Enable virGL for the guest
OBSERVED RESULT
Bad graphics performance
EXPECTED RESULT
Good graphics performance
SOFTWARE/OS VERSIONS
Linux: 6.7.4-arch1-1
KDE Plasma Version: 5.93.0
KDE Frameworks Version: 5.249.0
Qt Version: 6.7.0
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