I upgraded from 20.04 to 22.04 and after reboot I get the following screen / errors (see screenshot) and it goes to the initramfs shell. It's a RAID system. It might be that boot partition was too full during upgrade, or that when freeing space pre-upgrade I deleted too much (and wrongly) from the boot folder. In the Grub menu there's two kernels to choose from (generic and low-latency variant) but none of them work, all revert to initramfs shell.
Problem sounds similar to: System boots to initramfs after upgrade from 21.10 to 22.04"dmsetup ls" shows indeed the block devices (see screenshot) but partprobe is not found. EDIT: I managed to mount the partitions when booting into a Live USB. But still don't know how to make the system boot.
Can someone provide advice please? I'm pretty lost here... what other information do I have to provide to debug this properly?
Thanks in advance