I installed the update that appeared two days ago and after reboot was left with a black screen and cursor. I tried all the fixes suggested by Google but nothing worked so I had to install a different system. This is just a basic Intel mini PC with no Nvidia (KDE).
If you have overwritten the installation with a different system I guess you just wanted to report the problem, not to fix it, so I’m just taking note of the information you are providing though I don’t have any clue on anything to fix.
Weird. I forgot I also had an installation on another machine so I updated that today. There were 294 updates and this time I used dnf via terminal instead of discover and everything went fine. The only differences apart from the update method are one machine is a newer Intel based mini-PC (AceMagic) with Celeron N97 (the one that failed) and an older NUC with J4005 which updated successfully.
Thanks for the follow-up, a similar problem was reported and fixed in the italian forum and I think this actually also explains your case.
The update from Nov 8 included openexr 3.5.3-2mamba, which was accidentally built with instructions (AVX-512) that many CPUs don’t support, including your Celeron N97. Plasmashell loads that library through the image plugins and crashed at startup, leaving a black screen with just the cursor.
A fixed build (openexr 3.5.3-3mamba) reached the stable repository on Nov 10, so when you updated the NUC today you already got the fixed version. It didn’t matter whether you used dnf or Discover.
If you reinstall openmamba on the mini PC, a normal update should now work fine. Sorry for the trouble.
Thanks – will do.