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I have Ubuntu 11.10 64bit with Gnome Shell running (nvidia-current 295.20 on 9800GT) and notice that after a while the Gnome Shell start s to lag a bit.

When I say lag, everything works fine and is snappy until I open the overview (Windows | Applications) or show my notification area - then it starts to lag quite a bit, until I leave that view and go back to normal usage.

This is usually easily remedied by ALT+F2 'r' to restart Gnome Shell - but something must obviously be causing this, a bug maybe?

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closed as too localized by Jorge Castro, Takkat, Ringtail, The Lord of Time, Jacob Johan Edwards Sep 13 '12 at 14:08

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, see the FAQ.

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I'm on ati fglrx and have probably the same issue. I found out, that in my case the problem was some sort of notification (mine was causing hotot - preferencies use native notification) that caused that behaviour. When I checked the notification (gone with mouse to the left down corner) gnome-shell restarted it self and was snappy again. Try to sort what kind of app does that, in my case it seems to be hotot notifications.

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