https://bugs.kde.org/show_bug.cgi?id=492672
Bug ID: 492672
Summary: switching virtual desktop does not unmap windows
Classification: Plasma
Product: kwin
Version: 5.27.11
Platform: Debian unstable
OS: Linux
Status: REPORTED
Severity: minor
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: o...@kde.org
Target Milestone: ---
on X11, if, and only if compositing is enabled, switching to a different
virtual desktop does not unmap the windows from the previous desktop.
i suppose this is simply a result of it being (supposedly) unnecessary, as the
compositor takes care of hiding the out of view windows. it also has the nice
side effect that switching is rather instant.
however, it has the rather unfortunate side effect that applications don't know
that they can stop repainting their windows entirely, so it causes a rather
significant resource consumption problem. my go-to example for this is viewing
https://www.wetteronline.de/wetter/berlin in chrome, which eats lots of cpu and
gpu.
this is sort of the same as closed bug #431242.
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