Installing one of these (screenshot attached) updates causes my system to go to the login loop. It doesn't happen right away everything seems to work after the update but if I restart I have the login loop. I tried some common things from internet to solve the loop and none of them worked. The only way to exit the loop is to restore the system with timeshift.

No other updates causes it. (And I installed plenty after I started to experience this issue). Reinstalling NFS server causes the login loop as well (after the restart). Any help will be very appreciated. Thanks.

Technical information: Ubuntu 20.04, GPU: ATI Radeon HD 5670

Attached Thumbnails

 

After the update is done and before you reboot, anything gets written to syslog?

And, login loop happens in GUI? What happens if you switch to text terminal or even SSH into the machine?

Where is the syslog located? Login loop happens in GUI. I'm able to log in to text terminal with alt+F3 or to SSH. SSH is the boot option, right?

Does the login loop happens for just one user or all the users?

This document can help you to locate various log files:
https://ubuntu.com/tutorials/viewing...iles-locations

Look under /var/log... More specifically /var/log/syslog
And, also /var/log/Xorg.0.log

And, check this https://askubuntu.com/questions/1527...-specific-date

If you think that NFS update is causing the problem, perhaps above link can help for you to remove that update.
Since this is NFS server, are the clients able to mount the NFS shares from this server?