Framework 13 (AMD)
Ubuntu 22.04
After upgrading via apt this morning my framework would only boot directly to a busybox prompt (initramfs).
I resolved the boot issue by running fsck, but lost my home directory in the process.
Luckily I had a fairly recent backup to restore from.
As this is a fairly vanilla machine, I’d expect others to encounter this issue. Posting here in case it saves anyone else some headache.
Thanks for sharing @wired_penguin ,
are you able to recall if the is error on screen when it didn’t boot?
and were the parameters the fsck checks just generic? just for everyone’s info. thanks 
So the machine booted to the encrypted login page without issue. After entering the decrypt password the machine dropped to busybox prompt.
Sorry I didn’t take a picture now.
To fix I took the steps outlined here however my mapped drive was named differently.
The only other thing that might be noteworthy was that after running apt upgrade I got a bunch of warnings about a missing amd driver. I ran a search but I don’t have a record of the exact error either as the search history was on the same machine.
Sorry I can’t be of any more help.
I’ve also experienced a similar situation in late January. My system hang due to the vp9 decode issue plus another problem with syncing (my fault) so I forced a reboot in a “not gentle way”. Upon rebooting I found myself with errors on filesystem metadata, the filesystem was not mountable and I was stuck in the initramfs root enviroment.
To everyone that find themself in such a situation I advice caution in order to preserve your data. Given that the tools available in the initramfs enviroment are limited a good advice might be to fire up a distro from a live iso usb/extra partition to diagnose what happened and (if needed) backup your files with the powers and tools of a full distro. I booted from usb, recoved and restored the last snapshot and I was back on track.