https://bugs.kde.org/show_bug.cgi?id=358202
Bug ID: 358202
Summary: kwin often stops partially working (Function not
implemented)
Product: kwin
Version: 5.5.3
Platform: Archlinux Packages
OS: Linux
Status: UNCONFIRMED
Severity: crash
Priority: NOR
Component: backend-x11
Assignee: kwin-bugs-n...@kde.org
Reporter: softw...@moritz-augustin.de
Created attachment 96727
--> https://bugs.kde.org/attachment.cgi?id=96727&action=edit
output of strace kwin_x11 --replace (at time of the problem and afterwards)
I have just switched to Plasma 5 (using Arch Linux packages) and SDDM (from
previously running KDE4). A severe problem for me is the following: a few times
a day KWin stops working properly with errors "Function not implemented"
visible in the strace output (see Screenshots). The effective problem for me as
the user is that in such a situation (a) copy&paste of both text and files is
broken, (b) moving windows by holding left-click on the window titles does not
work anymore and (c) the menus in Firefox cannot be clicked on/nor opened with
the keyboard combinations anymore.
I cannot reproduce the problem by a particular action but observe it very often
(too often in my production environment). I am using Arch Linux with relevant
packages kwin 5.5.3-1 and nvidia 358.16-3, i.e., the proprietary NVIDIA driver
for my GF119 GPU, also known as GeForce GT 610.
The issue can be basically repaired by restarting kwin with the command
kwin_x11 --replace. However, even afterwards (i) copy/paste seems to be broken
at least from windows which existed before the kwin restart and (ii) the menus
in Firefox cannot be opened and only restarting Firefox completely resolves the
latter (which is not very comfortable when using multiple windows with lots of
tabs etc.).
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