You can bring the network interfaces down, if you like. That will stop downloads, but all other traffic too and a restart won't be automatic, unless...
Looks like you need to boot from a flash drive with a Linux ISO and run fsck on all the Linux file systems in the box. The same flash drive you used...
After some more extensive testing, the problem with the external USB audio device persists. Pipewire fails to get it back into the audio stack after...
I used Ubuntu some 15 years ago, then went to Debian and stayed with it until now. For reasons that don't matter right now, I've been trying to come...