I have a laptop PC running Ubuntu 12.04.1 32 bits that crashes randomly. It becomes unresponsive, I can only move the mouse but nothing at all reacts. If I press ctrl+alt+Fn I can see the terminal, and while typing commands I get the following error messages repeated a few times:
[sdb] Asking for data cache failed [sdb] assuming drive cache: write trough
On this session,
sdb is my sdcard reader, but I don't know if it is permanente and I certainly don't have always an SD card on it. Also, usually firefox is running when it hangs, but that's hard to diagnose as I have firefox running 99% of the time.
I have read this article but I'm not very confident about the accepted answer as my situation (1) is not a single program that stops working, (2) the mouse still works, and (3) as I see it, REISUB is almost the same as pressing reset.
The same computer doesn't hang when using Windows (at least not nearly as frequent).