Confirmed to not be (just) a compiz bug because it also affects Wayland,
which doesn't use compiz. Using Bionic beta with kernel
4.15.0-15-generic.
This bug filed for Linux package, when I wasn't sure which project was
responsible:
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1744543
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Problem does not happen when booting from linux kernel 4.8.0-34-generic;
CPU usage is slightly higher than Metacity, no significant kworker
threads.
It does happen with updated kernel 4.13.0-25-generic (previously -21).
When I went to recovery mode for 4.13.0-25, tried to select failsafeX
graphics
The 'Show Repaint' plugin in compiz showed that most of the screen was
not getting repainted. Disabling 'Framebuffer object' under OpenGL, in
ccsm (CompizConfig Settings Manager), caused the whole screen to be
repainted but CPU usage of compiz stayed the same. If Workarounds >
'Force full screen re
This also affects the 'Unity' login option, which uses compiz.
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https://bugs.launchpad.net/bugs/1744515
Title:
Compiz flashback has high-CPU kworker thread when screen updates
To manag
