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I installed updates, rebooted, and now I just get this at the sddm login screen. The virtual keyboard comes up first, but this is what shows up after closing it. Neither Wayland or X11 plasma sessions will load upon login. I just get sent back to this.

My searching showed two results with someone having this same issue in the last couple of years, but one of them removed their post and the other was never replied to.

I tried running the CLI lookandfeeltool to change the theme, but it throws a very similar error. I also installed Xfce to see if it was just plasma, and that won't run either. Any thoughts?

I installed updates, rebooted, and now I just get this at the sddm login screen. The virtual keyboard comes up first, but this is what shows up after closing it. Neither Wayland or X11 plasma sessions will load upon login. I just get sent back to this. My searching showed two results with someone having this same issue in the last couple of years, but one of them removed their post and the other was never replied to. I tried running the CLI lookandfeeltool to change the theme, but it throws a very similar error. I also installed Xfce to see if it was just plasma, and that won't run either. Any thoughts?

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[–] • 2 pts

Your window manager can't deal with one of the libraries it needs, so it dies and kicks you back to the login prompt because your wm is also your X session manager ( last program invoked by your login scripts ).

If you can change your window manager from your KDE config you can get things fixed up from an X environment. Otherwise you have to work it out from the text console or terminal. twm has been included with X forever. It is like driving a '74 pinto with no foam cushions in the seats. And no doors. It will do the job if X is required. Don't ask me how to use it xD it has been decades.

I would bet your system is mostly okay with this error happening when you get to KDE in runlevel 5.

Try ldd on those .so libraries. You may need to manually set LD_LIBRARY_PATH to some dependencies to get you through the night.

[–] • 0 pt

I installed the xfce desktop environment package group and tried logging in with that session, but I get the same thing: black screen with mouse cursor for a few secs then back to the login.

/var/log/messages isn't being particularly helpful either. Just for shits and giggles I ran a "dnf reinstall -y '*'" so we'll see how that goes...

[–] • 1 pt

X may have its own log apart from messages.

[–] • 0 pt

Turned out it was hardware failure. Linux is pretty tolerant to a point. When I tried to install Windows however (for work and on a separate brand new HDD) the installer just wouldn't finish. It would fail at different points every time.