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I had a dual boot with Ubuntu 12.04 and Windows 7.

My update manager started to do weird things a while ago. It didn't get any new updates and it crashed a thousand times when I clicked on "upgrade now" to ubuntu 14. Then I always tried to report a bug from the dialog shown and it NEVER worked.

I had to upgrade so I could install some packages that only work on 13.10 and further. As I couldn't do it with the update manager, I tried with:

sudo apt-get update
sudo apt-get upgrade

After this I rebooted and that was it. Nothing works. I get a black background after the session starts (I had it configured to automatically start with my user). Network doesn't work, I get a "network disconnected" message as a welcome dialog so I can't use any online solutions.

USB ports are also broken, so I can't use another computer to download the solution.

Using a regular keyboard I ran a terminal and tried some of the solutions I found online, most of them need network connection or some sort of package download.

I didn't find any IOMMU options in my BIOS setup, doing some research I noticed my mother board is not on the list of compatible ones (it's an ASUS M5A87).

Then I tried:

sudo dpkg-reconfigure -a

It returned some errors that I couldnt catch, but the result is that everything is the same (or worse, I honestly don't know).

I also tried to run an older linux kernel to see if it works, but I get "failed to start session "ubuntu" " before and after the login menu (I get this message before and after I try to login).

I know there are a lot of details I am not giving, but I'm getting a bit desperate, I can't find answers for this problem and I wanted to start this question as soon as possible. Ask for any details that can help.

Of course, everything is working like a charm from windows 7, so no hardware issues here.

Rubén Cabrera
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  • You should follow this answer to some extent. When you have entered the chroot. Instead or in addition to installing a newer kernel install all needed packages. – Anders F. U. Kiær Sep 23 '14 at 18:42
  • After all this issues, if I get a live CD in my tray is not going to be to repair Ubuntu, it'll be to do a fresh install and burn the remainings to ashes. Thanks, but this is taking too much effort and it's not worth repairing if it's more dificult than installing some other distro. – Rubén Cabrera Sep 23 '14 at 19:26
  • Could you try re-running sudo dpkg-reconfigure -a, and getting the errors? – Aaron Hill Sep 23 '14 at 19:47

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