https://bugs.kde.org/show_bug.cgi?id=363093
Bug ID: 363093
Summary: Tearing prevention (vsync) settings lost when monitor
turns on/off
Product: kwin
Version: 5.5.5
Platform: Kubuntu Packages
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: multihead
Assignee: [email protected]
Reporter: [email protected]
Since the upgrade to Kubuntu 16.04, every time I turn on my TV (third monitor)
there is lots of tearing when viewing videos. This is with an Intel i7 Haswell
integrated GPU (no dedicated graphics card). The workaround is to go to System
Settings -> Compositor and re-apply the Tearing prevention ("vsync") setting
manually every time - it is set to "Full screen repaints", which is the correct
option, but in order to re-apply it I need to select a different option and
then "Full screen repaints" again and then click Apply, and everything is back
to normal (no tearing) as long as the TV stays on. I have to do this every
single time I turn on the TV for video to be watchable. This was not an issue
in previous versions, where the setting always remained in effect and I never
had to touch it regardless of turning anything on or off.
Reproducible: Always
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