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I find that GNOME3, after some period of time, freezes completely. The cursor is the only thing that responds. I find that logging in from another machine, and issueing a kill -1 to the gnome-shell process will temporarily give me response. But after 5 or so minutes, it begins freezing/unfreezing in a cyclical fashion, and quickly returns to a completely unresponsive state.

By freezing, I mean just that. GKrellM is frozen. So are clocks, and anything else that would normally show updates.h Mouse cursor still moves, but Keyboard, mouse buttons show no responses.

Some mornings, I come back to my system, and it is frozen, so I ssh in, and there is no longer any X server running at all! I reboot the machine in that case.

Otherwise, if lightdm, gnome-session, and gnome-shell are still running, kill -1 to the head gnome-shell (use pstree -plG) will give you enough response to save any work, and then log out to start the session over.

It seems (this may be purely superstition) that running firefox accelerates the breakdown. I usually have more than a few tabs open; I have Konsole and Terminal both running with maybe 5 tabs open on Konsole, and 20 tabs open on Terminal.

I have a 6-core AMD 64-bit processor; 8 gig of memory; a GeForce GT520 dual-monitor setup; running 64-bit Ubuntu 12.04;

What gives?

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closed as off topic by Jorge Castro, Eric Carvalho, Mahesh, Kevin Bowen, Basharat Sialvi Apr 24 '13 at 21:04

Questions on Ask Ubuntu are expected to relate to Ubuntu within the scope defined by the community. Consider editing the question or leaving comments for improvement if you believe the question can be reworded to fit within the scope. Read more about reopening questions here.If this question can be reworded to fit the rules in the help center, please edit the question.

Is it using swap while all that happens? – Uri Herrera Oct 16 '12 at 15:40
This happens to me often as well, and I'm on Gentoo 64-bit. I think it is a bug in Gnome 3. – Andrew Mao Dec 19 '12 at 16:57
This question should instead be filed as a bug report, and as such is off-topic, thanks! Instructions on filing a bug report are here. – Jorge Castro Apr 24 '13 at 13:42