https://bugs.kde.org/show_bug.cgi?id=449957

--- Comment #27 from phrxmd <philipp.reichm...@gmail.com> ---
Created attachment 149621
  --> https://bugs.kde.org/attachment.cgi?id=149621&action=edit
Backtrace when this happens as a DisplayPort screen comes online

Another very annoying instance where this has recently started to happen is
whenever I try to log into the Plasma session with an external screen attached
via DisplayPort to my Thunderbolt dock. In this configuration, Plasma is now
unbootable. KWin comes up, initializes the screen, crashes, comes up again,
initializes the screen again, crashes and so on. After going through this crash
loop a few times, I'm dropped back into the display manager.

This happens whenever a DisplayPort monitor attached to the dock comes up (see
backtrace attached). 

I'm not sure what led to this change. However, before the recent system update
(pre-kernel 5.17??), the eGPU in the dock and the DisplayPort screen attached
to the dock would come up already during the boot process, and I'd see boot
messages scrolling by on the external screen that duplicate those on the
internal desktop. Since the change, the external screen stays dark during the
boot process (maybe the eGPU in the dock gets initialized later?), and when
KWin tries to bring it up, KWin crashes.

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