Hello. I've been unable to boot into my Plasma desktop for the entire day. SDDM just gets stucks after I input my password and does nothing. If I try SDDM autologin with my current user, I just get a black screen with a movable mouse pointer.
If I try starting a session with a new fresh user, I get a dialog message saying kded5 got a segmentation fault.
My installation and KDE desktop was working fine for years before this. I'm posting this from XFCE at the moment.

Things I tried:

• Starting the desktop session from SDDM
• From startx (after adding "DEFAULT_SESSION=startplasma-x11" to .xinitrc)
• Reinstalling all KDE software
• Reinstalling all Qt libraries
• Running fsck
• Running badblocks
• Deleting .Xauthority (read it helped for startx)
• Logging in with another fresh user I just created with adduser command

I'm running Debian Bookworm.

Here's the content of .xsession-errors after I try to log in to Plasma

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Xsession: X session started for machine at Tue Oct 19 04:26:17 PM -03 2021
[...]
Application::crashHandler() called with signal 11; recent crashes: 4
KCrash: crashing... crashRecursionCounter = 2
KCrash: Application Name = kwin_x11 path = /usr/bin pid = 9192
KCrash: Arguments: /usr/bin/kwin_x11 --crashes 3
KCrash: Attempting to start /usr/lib/x86_64-linux-gnu/libexec/drkonqi


KDE information:

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KDE Plasma Version: 5.23.0
KDE Frameworks Version: 5.86.0
Qt Version: 5.15.2
Kernel Version: 5.14.0-2-amd64
Graphics Platform: X11


Please let me know if there's any other command output or information you may need to know what's going on.

This is my work computer and I've got everything set up in my KDE Plasma desktop so I'd greatly appreciate any help!

Are you running Debian testing? If yes, this is currently broken since not all packages of 5.23 have transitioned to testing. You need to downgrade libkdecoration, see https://bugs.debian.org/cgi-bin/bugrepo ... =996726#10

Thank you so much! That was it!

For anyone else having this issue:

Download the previous version of libkdecorations2-5v5
https://snapshot.debian.org/archive/deb ... _amd64.deb
Install it with dpkg

And REMOVE libkdecorations2private9