https://bugs.kde.org/show_bug.cgi?id=398474
Bug ID: 398474
Summary: Kwin sometimes freezes, consuming 100% of one CPU core
Product: kwin
Version: 5.13.5
Platform: Archlinux Packages
OS: Linux
Status: UNCONFIRMED
Severity: major
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: kishor...@gmail.com
Target Milestone: ---
Sometimes kwin freezes, and does not respond to mouse movement, keyboard
shortcuts etc. It usually happens when I am triggering the 'desktop grid'
effect via a screen corner, and the animation just stops halfway. However, I
cannot reporduce this consistently, and I am not sure if this is actually the
trigger.
If I switch to a tty during such a freeze and open htop, I find that kwin_x11
is taking 100% of a CPU core. It does not respond to SIGTERM, so I usually have
to send SIGKILL and then start kwin again.
I tried to capture to output of kwin during one such run (by starting kwin
using something like 'nohup kwin_x11 --replace > kwin_log_20180911-0915.txt &',
and it is below:
OpenGL vendor string: Intel Open Source Technology Center
OpenGL renderer string: Mesa DRI Intel(R) Haswell Mobile
OpenGL version string: 4.5 (Core Profile) Mesa 18.1.8
OpenGL shading language version string: 4.50
Driver: Intel
GPU class: Haswell
OpenGL version: 4.5
GLSL version: 4.50
Mesa version: 18.1.8
X server version: 1.20.1
Linux kernel version: 4.18.6
Requires strict binding: yes
GLSL shaders: yes
Texture NPOT support: yes
Virtual Machine: no
kwin_x11: ../libepoxy/src/dispatch_common.c:858: epoxy_get_proc_address:
Assertion `0 && "Couldn't find current GLX or EGL context.\n"' failed.
After the last line, there is some stuff about raising a crash handler, which I
assume happens when I kill the process.
I am runnning Arch Linux, and using the 'xf86-video-intel' driver. I am not
sure what other information would be relevant here.
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