https://bugs.kde.org/show_bug.cgi?id=454425

            Bug ID: 454425
           Summary: Windows are resized to a minimal height if I unplug
                    external monitors
           Product: kwin
           Version: 5.24.4
          Platform: Fedora RPMs
                OS: Linux
            Status: REPORTED
          Severity: normal
          Priority: NOR
         Component: multi-screen
          Assignee: kwin-bugs-n...@kde.org
          Reporter: ptsel...@outlook.com
  Target Milestone: ---

Created attachment 149225
  --> https://bugs.kde.org/attachment.cgi?id=149225&action=edit
Screenshot with the issue.

SUMMARY
***
My current setup is this: 
1. Laptop screen at  2560x1440
2. 2xExternal screens at 1920x1080, one at DVI-D and one at HDMI port or the
dock. 
3. KDE with X11

Problem: When I suspend the laptop, or I close the lid, or I unplug any of the
external monitors, or I simple undock the laptop, all open windows placed at
the un-plugged screen are moved to one of the other screens, BUT with very
minimal height! 
If the session is locked, and I have at least 2 screens, the unlock screen is
visible to only ONE screen. If I use only the laptop's screen, the unlock
screen is not visible and I cannot even see if I type the password to unlock
the screen. Yes, when I manage to unlock, the windows are in a very minimal
HEIGHT. Windows placed on a screen that is not unplugged, are not affected. 

This is the outcome when I undocked the laptop this morning. Firefox and
Dolphin where placed on the external screens. The other windows where placed at
the laptop's screens, thus they are not affected by this issue. 

Note: Telegram, which as far as I can tell is not a KDE app, is NOT affected by
this issue. However, Libreoffice, Firefox, Chrome, ALL of the other KDE apps
ARE affected. 

I have no clue if this is a KWin, KScreen or anything else related, I open in
here because it looks like a mis-calculation of the window size from KWin, but
please move it to the right project if it doesn't belong here. 

***


STEPS TO REPRODUCE
1. Login to KDE in a multimonitor setup, preferably using screens with
different resolutions
2. Suspend the PC/Undock the laptop
3. Notice the height of the windows. 

OBSERVED RESULT
Windows have very short height when they are automatically moved to another
screen. 

EXPECTED RESULT
Windows size is maintained. 

SOFTWARE/OS VERSIONS
Linux/KDE Plasma:  Fedora 34
KDE Plasma Version:  5.24.4
KDE Frameworks Version:  5.91.0
Qt Version: 5.15

ADDITIONAL INFORMATION
https://postimg.cc/WDjKCBpn

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