https://bugs.kde.org/show_bug.cgi?id=445253

Philipp Reichmuth <philipp.reichm...@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|WORKSFORME                  |---
     Ever confirmed|0                           |1
             Status|RESOLVED                    |REOPENED

--- Comment #4 from Philipp Reichmuth <philipp.reichm...@gmail.com> ---
It's back. Last thing I did was to put the laptop to sleep by closing the lid. 

Before suspend, the external screen was set to 3840x2160.
Upon wakeup, it came up at 2560x1440 and nothing I I would change in the
display settings KCM would actually set the monitor to anything else but
2560x1440. It's as if KWin refused to change the physical resolution. I could
change scaling settings and they would get applied to 2560x1440, no matter what
resolution I actually selected. Windows came up as if the size was still
3840x2160 (i.e. with the outer controls outside the screen margins).

I managed to restore it to normal was to unplug the monitor's power cable. This
led to a crash in Plasmashell (bug 438839) and Akonadi (bug 445249), but when
Plasmashell came up again on the external monitor it was at 3840x2160. 

System information:
Operating System: openSUSE Tumbleweed 20211202
KDE Plasma Version: 5.23.4
KDE Frameworks Version: 5.88.0
Qt Version: 5.15.2
Kernel Version: 5.15.5-1-default (64-bit)
Graphics Platform: Wayland
Processors: 8 × Intel® Core™ i7-8550U CPU @ 1.80GHz
Memory: 15.5 GiB of RAM
Graphics Processor: Mesa Intel® UHD Graphics 620

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