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Every once in a while, without any warning or discernible pattern, my whole Ubuntu machine freezes; the system clock in the upper-right corner stops ticking/moving, all open applications are frozen and cannot be interacted with, the mouse cannot be moved, etc. The only fix thus far has been to restart.

The only common pattern that I think is a solid suspect is the fact that I believe that Mozilla Firefox (v. 20) is open and running almost every time this happens, if not every time. It happens if I leave my machine running over night (and FF is also running), and sometimes it happens while I'm actively using FF (clicking a link, doing some DOM operation, whatever).

I'd like to attack/solve this problem from both the OS- and application-perspective. I'd like to know what logs (for both Ubuntu and FF) I could start looking in for warnings, errors or failures. Also interested in what the community's input/feedback is and if there are any other suggestions for debugging. Thanks in advance!

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closed as too localized by Chan-Ho Suh, Jorge Castro, Raja, Thomas Ward, Mateo May 28 '13 at 1:27

This question is unlikely to help any future visitors; it is only relevant to a small geographic area, a specific moment in time, or an extraordinarily narrow situation that is not generally applicable to the worldwide audience of the internet. For help making this question more broadly applicable, visit the help center.If this question can be reworded to fit the rules in the help center, please edit the question.

Not to make light of your issue, but getting marked as dupe is not the only potential danger here... the other is getting marked as 'too localized'. – Chan-Ho Suh May 26 '13 at 2:34

I guess to read this link can help you solve your problem:

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