Upgrading with update-manager over remote GDM

[Thomas Novin]

(copying text from my LP bug[1])

Hello

I was about to do a distribution upgrade from 8.10 latest to 9.04 alpha
yesterday. I started it via a remote GDM session (which seems to run
over SSH). I got a warning that the upgrade might fail and that a second
sshd was started on port 9004. Well, probably nothings going to happen I
thought.

After downloading all packages and upgrading for maybe 5-10 minutes my
GDM session froze. I was unable to contact the client that I was
upgrading, didn't even respond to ping.

When I was able to check the remote client out physically I noticed that
my session previously active was still running. I couldn't use anything
though, nothing was possible to start. I tried to restart X but it
didn't start again. I could see lots of segfaults in dmesg and ifconfig
showed that there was no eth0 any more.

My suggestion: Make the warning a LOT more scary! It took me a while to
repair the system and my upgrade probably isn't that good because it's
done mostly via aptitude and not update-manager.

1. https://bugs.launchpad.net/ubuntu/+source/update-manager/+bug/322482

Rgds