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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?

o_o_o--
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    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
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    **First**: Don't put the **answer** into the **question**, you should [answer your own question](http://meta.askubuntu.com/q/3004/62483). **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](http://meta.askubuntu.com/questions/1317/what-to-do-with-questions-that-describe-known-bugs/) is off-topic, thanks! [Instructions on filing a bug report are here](http://askubuntu.com/questions/5121/how-do-i-report-a-bug). – Flimm Jan 19 '13 at 21:04

1 Answers1

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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
o_o_o--
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