This problem is an ongoing issue for me. Maybe someone has an idea out there.
I've been using Ubuntu 32 bit for years with much pleasure. It all stopped when I upgraded to version 12.04.
Since then, the computer keeps freezing after different time intervals of useage, mouse, screen, keyboard - the only way to revive it is a hard reset. Sometimes, while browsing the web (via Firefox or Chrome), the system freezes, however it is a "different freeze" and I can use the combination of CTRL+ALT+F2 to go into a terminal, type my user and password, followed by CTRL+ALT+F7 to return to the GUI interface. However, the interface is lacking the side taskbar and the upper statusbar - they don't reappear until I force reboot via terminal.
I must add that I've installed Fedora insted - hoping it will work properly - but the same thing happend with Fedora (latest version). Made me think there is a problem either with my hardware configuration or with the kernel (I don't know whether Fedora and Ubuntu use the same kernel). I tried formatting the hard drive and reinstalling. The same problem occured. Everything works fine with Ubuntu 11.10. It is only the later versions which present me with these freezing problems.
- Intel Core i5-2300 2.8GHz-3.1GHz 6MB cache 95W LGA1155 desktop computer
- Intel Bearup Lake DH67BL H67 LGA1155 uATX
- Sound & Graphics cards - Intel on board.
- 4GB memory
- 100TB HD