I have a 2015 Acer S7 393, i5-5200U cpu, 8 Gb ram, HD5550 graphics, 2 * 64 Gb IRST kingston SSD, upgraded yesterday from 20.04.4 LTS (working fine) to 22.04 LTS.
The pc freezes after logging in (graphically, because using Ctrl+Alt+F2 on a virtual tty is ok, logging is ok, pc is working). It is with 5.15.0-48 kernel (and also with 5.4.125 old kernel, whereas 5.4.126 kernel crashes with kernel panic).
I cant 'find any hint in the logs to understand where it may come from : any hint ?
I had similar issues after upgrading Ubuntu from 20.04 to 22.04.
In my case GNOME kept crashing and restarting after I logged in, apparently because of NVIDIA drivers getting messed up.
I fixed my graphics issues with the steps described here
In your case hopefully the sudo ubuntu-drivers autoinstall is smart enough to install the ATI drivers you need.
Sorry, I've been too quick, did not search enough : found an hint here about gnome extensions, and remembered I saw a line 'writing' about that in syslog, so I tried this ... 'et voila', I passed the freeze at loggin :-D
Can search and fix it definitively now.
sudo ubuntu-drivers autoinstalldid the trick! Thanks! – dobeerman Aug 04 '23 at 05:38