I have a dual boot (w7, ubuntu 12.10 ) laptop. Everything was OK since some weeks. Now I am unable to boot my ubuntu 99 times of a hundred.
The process start with the bios settings and all, then grub screen shows up normally ( with all the correct options ) then, when I choose ubuntu option screen turns black ( with back-light ) and that's all ...
I have tried with Ctrl+Alt+F1 to try to drop to the root console but nothing happens ...
IF I try enough times the logging screen shows up and from there everything goes smoothly.
This is my first serious issue with Ubuntu (and I'm using it since 8.04 version ) and I have no idea where to start investigating ...
This error has made my computer unusable so please, I need help ...
Thanks for all in advance.
P.S.:Since I updated to 12.10 while I am working normally from time to time a window pops up with a "System program problem detected". I haven't found a way to get more details about the problem and after reading some web sites seems something "normal" ( or at least common ) but I mention it here just in case.