Wow, thank you so much for the comprehensive reply and the detailed help.
I’ve tried a few more things, but I’m afraid I’ll have no choice but to reinstall Kubuntu. At some point.
Something is definitely not right. Today, Steam suddenly wouldn’t start at all. Even though the last thing I did yesterday was play CS. I turned on my PC today and Steam isn’t working anymore. Not at all. No error message or anything…
I must admit that I’m losing some of my enthusiasm for Linux. After over 30 years of Windows, I was actually glad that I finally plucked up the courage to try Linux at the start of the year. After all, there are more and more reasons to avoid Windows these days. But if, every time I restart Linux, I have to worry that some programme will suddenly stop working, it’s really demotivating.






Thanks for the suggestion. That’s what the console displays when I try to launch Steam. Do you have any idea what that means? :)
markus@markus-PC-Kubuntu:~$ steam Testing for explicit PulseAudio choice... ...and PulseAudio has been explicitly chosen, so using it. INFO: filtering /home/markus/.local/share/flatpak/exports/share out of XDG_DATA_DIRS because it is unreachable INFO: filtering /var/lib/flatpak/exports/share out of XDG_DATA_DIRS because it is unreachable INFO: filtering /usr/share/kubuntu-default-settings/kf5-settings out of XDG_CONFIG_DIRS because it is unreachable steam-runtime-launcher-service: no process found markus@markus-PC-Kubuntu:~$ Found NVIDIA version: 595.71.05 Need NVIDIA 32-bit: TrueEdit: Just as I’d finished typing this, the console command installed something after about 3–4 minutes. I couldn’t really tell what it was. But then Steam and also CS finally launched. :D I was kind of hoping that it might have fixed WoW ‘by itself’ as well, but unfortunately not.