My Gnome Shell (version 42.9, Ubuntu 22.04 LTS) started to behave weirdly this morning. As far as I can tell, the problems didn't appear yesterday.
All extensions have been deactived, and if I reactivate one, it doesn't seem to work. For example, if I activate the extension Apps Menu, no menu is shown, even though the extension is marked a activated on extensions.gnome.org/local.
Several keyboard shortcuts are not working, for example those related to window placement like Super-Cursor right etc.
If I try to restart the shell by Alt-F2 and restart, the command isn't found. The alternative command r isn't found, either. Other commands work, when I type gedit, Gedit starts up successfully.
I'm not aware of any updates, new packages etc. that could cause this.
Does anybody have an idea where I could start to poke? Thanks for all suggestions.