How do I safely remove/repair a failed upgrade?

[mooz123]

I did a partial upgrade to kernel 3.0.0.16. Afterwards the x server was not working, it seemed. I got a terminal prompt, could log in and the command xstart was not recognized. 3.0.0.15 is still working fine.

Could somebody please help me, what is the best way to repair this?

HP desktop, Ubuntu 11.10, Intel® Core™2 Duo CPU E4500 @ 2.20GHz × 2

[darkod]

Not sure if a repair is better and how to do it, but you can remove it with:
sudo apt-get remove --purge linux-image-3.0.0-16-generic

After that run:
sudo update-grub

to modify the boot menu.

You can probably install -16 later again.

[mooz123]

That solved it, thank you Darko.
Ubuntu magic: posted, answered, implemented and tested in 12 minutes!:)