https://bugs.kde.org/show_bug.cgi?id=358416
Bug ID: 358416
Summary: kwin_x11 doesn't respawn after crashing
Product: kwin
Version: 5.5.3
Platform: Archlinux Packages
OS: Linux
Status: UNCONFIRMED
Severity: major
Priority: NOR
Component: general
Assignee: kwin-bugs-n...@kde.org
Reporter: michaelkutsch...@web.de
Created attachment 96795
--> https://bugs.kde.org/attachment.cgi?id=96795&action=edit
xsession error log
kwin_x11 crashes at every opportunity, even more often than kwin itself does.
There are tons of reports for that but I found none for the really annoying
part of this:
In contrast to kwin, kwin_x11 doesn't respawn.
## Situation after crash
After a crash, the situation is as follows:
- The content of an opened window is still there to interact with, but its
frame and title bar is gone.
- Most of the time I can't interact with the windows via keyboard, like
closing it with [Strg+q]
- The screen state stays the same if I switch Activities or Virtual Desktops.
- Other that a lot of XBM error 3 (BadWindow), which are always there, there is
no mention of any problems with kwin or x_11 in journalctl.
## State of process kwin_x11 after crash
In the process tree, kwin_x11, child of ksmserver, is STOPPED. Sending the CONT
signal doesn't change anything on the desktop; only effect is that the process
now uses ~ 50% of CPU without doing anything.
## .xsession-errors
.xsession-errors is the only source I found, that gives a hint on why kwin_x11
doesn't respawn:
KCrash: Application 'kwin_x11' crashing...
KCrash: Attempting to start /usr/lib/drkonqi from kdeinit
KWin: Manager-Auswahl nicht möglich. Läuft ein anderer Fenstermanager?
(Versuchen Sie es mit --replace)
(Last line says: KWin: Manager-selection not possible. Is another
windows-manager running? (Try with --replace))
Full log in attachments [lines 244 - 246].
## Workaround
I have to restart kwin_x11 with
DISPLAY=:0 kwin_x11
--replace is not necessary and makes no visible difference.
Now kwin_x11 runs as child of whatever process I used to respawn it (in my case
dolphin).
Remarkably, it runs a lot more stable now, sometimes not crashing for days, in
contrast to barely 15 minutes after a system boot.
If I can do anything to help investigate and solve the problem, please let me
know.
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