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Xorg lag spikes during gameplay

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http://askubuntu.com – With almost any game I play, be it Minecraft, TF2, World of Goo or windows games running in wine, I get horrible lag spikes (after a shot time playing) that happen about every 15-20 seconds and last for 2-4. I have run "top" in the command line and can see that, very time the games lag, xorg jumps to the top (for the duration of the lag spike). I'm using an Acer Aspire running Ubuntu 12.10 64-bit, with 8GB of ram and an Intel® Core™ i5-2450M CPU @ 2.50GHz × 4 processor. It's driving me up the wall! If any of you kind souls know what the problem is and how to fix it, I would be eternall (HowTos)