If the system is actually freezing, then you won't be able to launch anything, including xkill.

BTW, I think you're looking for alt-f2, but again, if the system freezes, it won't work.

Is it the whole system that freezes, or only X? Try to open a virtual console with Ctrl-Alt-F2. Does that work ...

Ah, thanks for that! Actually the certificate was renewed, but the nginx service didn't reload for some reason. It should be back to normal now.

Yeah, that is an issue with distrowatch. Nothing we can do here. It is exactly as you described it.

That means there is something wrong with the flatpak. It should have worked no matter the locale. The package in the Salix repos does.

You could try something like:
LANG=C flatpak run io.sourceforge.pysolfc.PySolFC
I haven't tried it though.

I'm more concerned about why the salix package doesn't work for you. Do you get any error messages? It runs OK here. Make sure you have the python-pysol_cards and python-random2 packages ...

Did you try powertop and laptop-mode-tools?

There is no newer version of KDE available for 15.0 other than what's in the repos. You could try building a newer one with the slackbuilds on current, it may work, or not. In any case, it's not something I recommend you do.

As for staying with 5.23.5, you're talking about security holes. Are you ...

Try installing the libostree package.

Well... the issue is not with depfinder. The issue is that while the bind-9.16.25 package that came with slackware 15.0 originally did not actually depend on jemalloc, the upgraded bind-9.18.37 package does. You can confirm this yourself if you downgrade to the 9.16.25 package and run ldd on /usr ...