Run dmesg in a shell and see if you spot any scary looking messages.
On Fri, Jul 2, 2021 at 9:42 PM John Jason Jordan <joh...@gmx.com> wrote: > > On Fri, 2 Jul 2021 21:55:47 -0500 > Bill Barry <b...@billbarry.org> dijo: > > >You could run top to see if there is some process hogging the cpu. If > >so, kill it. > > I did that (actually, the GUI Task Manager). Of my 32GB of RAM 9GB was > in use. > > I ended up rebooting. Grr. So far since the first of the year I've had > to reboot four times because of stuff like this. This does not make me > happy. :( > > Something is wrong, and my #1 suspect at the moment are my EXFAT USB > drives. They frequently suddenly fail to accept read/write commands and > hang for 20-30 seconds. Except that in today's problem there was only > one mounted, and I unmounted and pulled it out, but the problem > continued, so maybe my theory is crap.