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.
After doing various things with actualizations and NVIDIA drivers through console (Ctrl+Alt+F2 on login page) and changing drivers in settings to Xorg, finally change from first to already selected option of Additional Drivers helped me with this problem.
Check the drive space where the root is located.
Sometimes lack of enough space causes this problem
For this, you can press Alr+Ctrl+f2 on the login screen to open a new terminal enter the username and password, and type the following code to see the available space:
df-h
which shows something like this:
Filesystem Size Used Avail Use% Mounted on
tmpfs 4.7G 2.9M 4.7G 1% /run
/dev/nvme0n1p1 824G 245G 538G 32% /
tmpfs 24G 259M 24G 2% /dev/shm
tmpfs 5.0M 4.0K 5.0M 1% /run/lock
efivarfs 192K 129K 59K 69% /sys/firmware/efi/efivars
/dev/nvme0n1p2 1.9G 33M 1.9G 2% /boot/efi
/dev/sda1 44G 589M 41G 2% /tmp
