I have been struggling with this since yesterday evening:
I upgraded from 12.04 to 13.10 in steps using
do-release-upgrade
Since the last upgrade I got the "Low graphics mode" screen with the options which I cannot select because the mouse is gone and selecting with keyboard did not seem to work on that screen either.
I got out of there by switching to TTY1.
Trying to fix the problem I have installed graphics drivers from AMD I had already downloaded previously. When this did not fix the problem I just did
apt-get install --reinstall fglrx
This did not help so I started messing with my desktop environments. I read somewhere to try reinstalling gdm but than I set that as default over lightdm which I was obviously using and then things got really fishy.
I never got the low graphics mode screen again but only terminal. after installing gnome-session-fallback I had a graphical loading screen again on boot but this crashes and shows terminal login.
I moved all my logs out of the default dir so I could see only the new ones. X.org shows some EE (error) that no compatible graphics card was found.
I have ATI Mobility Radeon 4570 in my laptop. As I said before I have tried installing the latest drivers.
Can anyone help me troubleshoot this problem further?
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