My HP desktop at work freezes regularly, and I don't know how to find out what is causing it.
The freezes occur when I've been away over night, either after I suspended the system to RAM or when I've left it running, and no CTRL+ALT or SysRq key combination does anything. After suspending, normally touching the mouse is enough to get back to my work, but not when it is frozen. All I get then is a black screen. Yesterday I left it running, and this morning I found it frozen, with the screen saver displaying the time as 00:14. I pushed the power button for a couple of seconds to reboot the system.
Where can I look to see what causes the freeze ups?
OS's I have used: Debian testing/stable, Ubuntu, Mint Debian, OpenSuse, Windoze