Bug#993274: machine unbootable after upgrade

Package: upgrade-reports
Severity: grave


Hi,

I have recently upgraded a machine from Buster to Bullseye. The machine
runs on an mdadm RAID1. After the upgrade, it had the symptom outlined
in #931896.

I followed the upgrade process, as described in

https://www.debian.org/releases/bullseye/amd64/release-notes/ch-upgrading.en.html


After completing this procedure, I ran

# apt install -f
# dpkg --configure -a

which both came up empty, suggesting that there was really no problem
left.


Since the machine didn't boot after upgrade, I'd say that warrants
'grave'.


As a fix, once I got access to the machine, running

# lsblk

to figure out the boot disks, then manually installing grub there like
this:


# grub-install /dev/sda
# grub-install /dev/otherdisk


solved the problem.


I am not sure why the upgrade process didn't handle this case, but think
the severity of the problem warrants a warning in the release notes.



Cheers,
Toni