https://bugs.kde.org/show_bug.cgi?id=415313
Bug ID: 415313
Summary: Severe kwin_x11 (on amdgpu) compositing performance
regression: bisected to 00bf75d06
Product: kwin
Version: git master
Platform: Gentoo Packages
OS: Linux
Status: REPORTED
Severity: normal
Priority: NOR
Component: compositing
Assignee: kwin-bugs-n...@kde.org
Reporter: 1i5t5.dun...@cox.net
Target Milestone: ---
git kwin_x11 (on amdgpu/polaris 11) can currently be effectively unusable: can
take minutes to switch windows with various effects on and a video playing (or
trying to), tho it's only "a bit choppy" if I turn the trouble effects off and
don't try doing too much window managing at once without stopping to let kwin
catch up.
KWIN_USE_INTEL_SWAP_EVENT=0 kwin_x11 --replace doesn't appear to help (it's an
AMD CPU and GPU but I thought I'd try it).
Problem effects (that I normally run and had to turn off until I could bisect)
are wobbly-windows, pretty much all of the popup-sliding/fading/etc stuff,
blur-behind, and repeat-zoom (as with key auto-repeat, seems kwin can process
about 5 zoom events a second, gets behind if auto-repeat is set any higher).
Bisected to 00bf75d06, so I'm pinned one commit back from that at a55dee3bd for
the moment.
This is with current kwin HEAD d72e96802 (gentoo/kde overlay live-git packages
for kde-frameworks and plasma). Two big-screen 4k TVs as monitors in
side-by-side configuration, if it matters. kwin_x11 reports (I don't see qt
version listed, it's 5.14.0):
OpenGL vendor string: X.Org
OpenGL renderer string: AMD Radeon (TM) RX 460 Graphics
(POLARIS11, DRM 3.35.0, 5.4.0-dirty, LLVM 9.0.1)
OpenGL version string: 4.5 (Core Profile) Mesa 19.3.0
OpenGL shading language version string: 4.50
Driver: RadeonSI
GPU class: Arctic Islands
OpenGL version: 4.5
GLSL version: 4.50
Mesa version: 19.3
X server version: 1.20.6
Linux kernel version: 5.4
Requires strict binding: no
GLSL shaders: yes
Texture NPOT support: yes
Virtual Machine: no
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