https://bugs.kde.org/show_bug.cgi?id=363499
Bug ID: 363499
Summary: kwin occasionally restarts compositing and hangs
Product: kwin
Version: 5.5.5
Platform: Kubuntu Packages
OS: Linux
Status: UNCONFIRMED
Severity: normal
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: andy...@mail.ru
Occasionally, I can see compositing being restarted at random actions, like
opening or closing application windows. This can be seen as flickering
semi-transparent panels on the desktop, as if the "Background contrast" effect
has been disabled and re-enabled. One time kwin hung while doing this and stuck
in an infinite loop, desktop unresponsive. I saved a few backtraces while it
was hanging. They were the same, so I attached only one. strace only shows
"clock_gettime(CLOCK_MONOTONIC, {90155, 71576276}) = 0" call in a loop (the
numbers change).
Reproducible: Sometimes
Steps to Reproduce:
I don't know a reliable way to reproduce this.
Kubuntu 16.04, x86_64. Nvidia driver 367.18. The restarts also happened with
364.19. OpenGL interface: GLX, rendering backend: OpenGL 3.1. Desktop theme:
Breeze, window decorations: org.kde.oxygen.
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