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I am running Ubuntu 12.04 LTS and since updating the kernel via the update manager from 3.2.0-110 to 3.5.0-18 I am having a peculiar issue. When starting the computer Ubuntu will load the log in screen repeatedly in very quick succession. It takes about half a minute before it stabilises and I can finally log in. The computer works fine after log in, only sometimes it will randomly log out the session.

I am not sure what causes the problem. Based on similar questions I reconfigured light dm but this led to the problem that I couldn't log in as I got a low-graphic error. This error also occasionally persists. Sometimes after log in there is an error report, one time concerning xorg and another was for unity-greeter.

Does anyone have suggestions how to fix this problem?

horseoftheyear
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1 Answers1

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I may suggest you to reinstall the grub.

In terminal do:

sudo update-grub

you will see now in which partition Ubuntu is installed (most of the time is this sda)

Then reinstall grub:

sudo grub-install /dev/sda

( sda can be different in your system ).

Julien Chau
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  • Ok, thanks. I will try this once I have reinstalled the most recent kernel. For the time being I switched back to 3.2.0-110 as I needed to have a functioning computer for work. – horseoftheyear Oct 13 '16 at 10:51
  • When you are working with the most recent kernel, do you have the same problem when you start the computer in recovery mode? – Julien Chau Oct 15 '16 at 09:40
  • Is this not the solution for your problem : http://askubuntu.com/questions/223501/ubuntu-gets-stuck-in-a-login-loop – Julien Chau Oct 15 '16 at 09:56
  • The recovery mode worked. The link you gave I tried toe bottom solution in the first answer, reinstalling lightdm, but that didn't work. On my current kernel (3.2.0-110) I do have troubles that sometimes the boot doesn't work as the computer goes in low-graphics-mode. So there is certainly seems to be something amiss with the graphic drivers. – horseoftheyear Oct 15 '16 at 12:25
  • I think you have wright. This is probably an “old” computer. You can do 2 things: first is waiting until another kernel version is coming out, or second simply stay with the kernel version that work – Julien Chau Oct 20 '16 at 10:48
  • I actually ran into more serious problems, Ubuntu not working at all anymore, so I did a clean installation of 14.04. Working perfectly now again. Was time to switch after 4 year anyway. – horseoftheyear Oct 20 '16 at 11:47
  • If your computer have enough memory: 16.04 is working fine to. – Julien Chau Oct 31 '16 at 12:07