https://bugs.kde.org/show_bug.cgi?id=366651
Bug ID: 366651
Summary: Kwin Compositor Stops Updating Windows
Product: kwin
Version: 5.6.3
Platform: Kubuntu Packages
OS: Linux
Status: UNCONFIRMED
Severity: crash
Priority: NOR
Component: compositing
Assignee: kwin-bugs-n...@kde.org
Reporter: mcfle...@vrplumber.com
This is a fairly frequent (many times/day) situation, so I can reproduce within
a few hours (this is my daily driver machine, unfortunately), but I'm not sure
what information to gather when it's in this state to aid in debugging.
Basically the problem is that Kwin will stop updating windows after a while. In
particular it's commonly seen while using Google Chrome, Chromium and The Eric
Python IDE but it seems to affect e.g. Konsole as well. The windows are
responsive to *input*, but their display does not get updated without an
alt-tab away and back (at which point all of the changes the application has
made are visible).
If I go to the compositor kcm and select a different rendering backend (e.g.
OpenGL 2.0 to OpenGL 3.1 or vice-versa) and apply, then the windows start
rendering again for a while, so I'm assuming this is likely an unhandled event
where the corrupt state is reset on compositor backend reset.
I realize this likely isn't useful as a bug report yet, I'm mostly looking for
advice as to how to produce a useful bug-report for the condition.
Reproducible: Sometimes
Steps to Reproduce:
1. General usage, chrome, Eric, Konsole
2. Lots of window switching, scrolling, editing (development workflow)
Actual Results:
After a few hours (or so), the compositor stops getting updates from
applications.
* nVidia Proprietary driver
* Dell XPS 15
* Kubuntu 16.04 (up to date)
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