I have ran 7.10 for around 2 years on a Toshiba Portege 2000 laptop and everything's been fine. Now I decided to take the plunge and upgrade to 8.04. After the upgrade, Ubuntu freezes shortly after boot-up.
I get this far:
- Enter user details
- Desktop is shown
- Top menu and bottom bar shown, including menus and top right-hand icons
- An icon appears top right saying a crash has been detected
- Shortly (3-5 seconds) after that, the whole machine freezes and both mouse and keyboard become unresponsive.
I have tried starting in failsafe mode and also failsafe Terminal. Both freeze after approximately the same amount of time. I have tried ‘Alt + SysRq + K’ but no reaction. I have tried Alt + SysRq, and ‘R’ ‘E’ ‘I’ ‘S’ ‘U’ ‘B’ -- that does something but the system does not come back to a responsive state.
There are no attached devices to unplug.
I would appreciate help in trying to isolate the problem -- I thought I would be able to look at some log files in the failsafe Terminal mode but before I get a chance, the system freezes...