Comment 4 for bug 1923865

Hi,

Checking the cmdline, the root filesystem is not set:

/boot/vmlinuz-4.4.0-21-generic root= ro quiet splash $vt_handoff

If I change it to "root=PARTUUID=fb561bdb-b68a-44ae-a884-a5fd70f80cf7" it's booting.

I see also two other errors during boot:

[ 0.075065] core perfctr but no constraints; unknown hardware!
fsck: error 2 (No such file or directory) while executing fsck.ext4 for /dev/vda1
fsck exited with status code 8

The fsk issue is also present in the bionic images I tried but not the perfctr one.

I just think something went/was wrong when grub was updated during build.