I can't use my PC anymore after upgrading from 14.04 to 14.10. The download and upgrade process was good but now when I turn the PC on, I get a black screen with error:
system program problem detected
And two options: Cancel and Report problem.
I can only use the mouse but the desktop is black and there are no icons. I can't activate Terminal. I read various posts on the web and followed different guides, but haven't solved the problem.
I can't even install a new version of Ubuntu starting from a bootable USB. When the system starts instead of booting the live version of Ubuntu, I get the GRUB menu ( ! ) ( I've never used Grub on my system ). When I select Ubuntu, the start-up process starts, but I get the error:
4.129466 i8042: no controller found
What is my problem? And how do I fix it?