Ubuntu all screwy after dist-upgrade. How do I revert the damage?

Question

After last night's kernel upgrade I'm getting the following symptoms:

After restarting computer several times.

One of my screens (always the same one) is split down the middle. Not always in the same place, and sometimes shows "trails".
Unity desktop half-loads and then doesn't respond to any command. The mouse moves but nothing is clickable.
Xmonad desktop responds (I'm on Xmonad desktop right now, using the second screen).

Curiously:

During one of my boots, Ubuntu brought up the Grub menu. I chose "ubuntu" option and suddenly everything worked fine. I restarted the computer again, and everything is screwy again.
I've tried to bring up the Grub menu again, but pressing shift during boot process makes my computer shut off instantly and restart.

How do I revert the damage caused by the dist-upgrade?

Do you have an ATI or nVidia graphic card? What model? Have you installed some driver? — Lucio, Jan 19 '13 at 01:12
kernel update was the problem. I apt-get autoremoved it and it's back to normal. -- To skip a kernel version, I just have to wait till the next kernel upgrade and apt-get dist-upgrade then, right? — o_o_o--, Jan 19 '13 at 01:22
First: Don't put the answer into the question, you should answer your own question. Second: If you do an apt-get dist-upgrade then your kernel version will be updated. If you want to keep a specific version you can remove the new one, just like you did. — Lucio, Jan 19 '13 at 02:47
This question should instead be filed as a bug report, and as such is off-topic, thanks! Instructions on filing a bug report are here. — Flimm, Jan 19 '13 at 21:04

score 1 · Accepted Answer · answered Jan 19 '13 at 03:31

1

Solution for future reference:

Kernel update was the problem. Removing the newly updated kernel solved the problem:

sudo apt-get autoremove linux-image-3.5.0-22.generic

answered Jan 19 '13 at 03:31

o_o_o--

1 Answers1