https://bugs.kde.org/show_bug.cgi?id=471314
Bug ID: 471314
Summary: kwin_x11 uses 2.2GB vram
Classification: Plasma
Product: kwin
Version: 5.27.5
Platform: Gentoo Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: compositing
Assignee: kwin-bugs-n...@kde.org
Reporter: redee...@metanurb.dk
Target Milestone: ---
SUMMARY
amdgpu_top shows kwin_x11 to be using roughly 2.2GB ram
STEPS TO REPRODUCE
1. have an amdgpu supported gpu (i have rx 590)
2. start a plasma X11 session
3. observe vram usage
OBSERVED RESULT
kwin_x11 uses a lot of vram! opening more windows only marginally affects the
usage. it is not a slow acting leak, doing kwin_x11 --replace to kill old kwin
and start new results in the new one using roughly same amount immediately.
EXPECTED RESULT
SOFTWARE/OS VERSIONS
Linux/KDE Plasma: gentoo, vanilla kernel 6.2.5(but also affects all older
versions i've run)
KDE Plasma Version: 5.27.5
KDE Frameworks Version: 5.106.0
Qt Version: 5.15.9
and kwin_x11 prints following:
OpenGL vendor string: AMD
OpenGL renderer string: AMD Radeon RX 590 Series (polaris10,
LLVM 15.0.7, DRM 3.49, 6.2.5)
OpenGL version string: 4.6 (Compatibility Profile) Mesa 23.0.3
OpenGL shading language version string: 4.60
Driver: Unknown
GPU class: Unknown
OpenGL version: 4.6
GLSL version: 4.60
Mesa version: 23.0.3
X server version: 1.21.1
Linux kernel version: 6.2.5
Requires strict binding: yes
GLSL shaders: yes
Texture NPOT support: yes
Virtual Machine: no
ADDITIONAL INFORMATION
This has affected older verisons of kde/plasma/kernel/mesa aswell, or atleast i
am 99% sure. I used to only observe total vram usage in radeontop, which has
remained the same for more than a year, only very recently did i learn of
amdgpu_top that can display per-app usage, and realized it was kwin_x11 (and I
was so sure it was somehow browsers causing it, I guess there are something in
the world we cannot blame them for, who would have thought)
I should note, though I dont know if it is relevant, that reasonably
frequently, every couple of days, I notice that switching between
workspaces/desktops becomes stuttery in the effect (where it just pans). This
is fixed by restarting kwin with kwin_x11 --replace, and its once again smooth.
After a kwin_x11, I get yellow/green/weird artifacts in most windows, that
disappear as soon as I resize them or they repaint themselves.
Sometimes(maybe once a week or so), I observe that right clicking on things
will bring up a black menu, sometimes a couple of times in a row, but then
just disappear, probably unrelated, but I dont know
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