Hi Patholeg. I am seeing the same thing on two of my computers. And as I google around, I see other posts in various forums by people who are experiencing similar issues. They are reporting crashes in recent installs of Linux (not just Ubuntu) even though it all worked fine with older versions. Even after doing a full reinstall, the problem returns.
And now I think I know why. This article tipped me off:
After I moved to XFS, all was fine. It's rock solid again. You might want to give this a try.
Originally Posted by Patholeg
I have been using Ubuntu for about 6 years and have just updated to 12.10. I have always found this very stable, but not so now. I have multiple crashes every time I use my computer, both using Firefox and when I'm just accessing files on my computer. I'm no Lynix expert, so any ideas have to be simple. I loaded 12.10 on line (I previously had 11.08). When it was installing I noticed it said the mirror drive (?) was not found, but everything otherwise went fine. I have thought of reinstalling from CD (which I don't have) but am not sure if I can do this when the system is already loaded. Any ideas/ help would be appreciated. My laptop is about 5 years old but in all respects it has been OK and relatively fast.