I have the same problem [see http://ubuntuforums.org/showthread.php?t=1151336] except the driconf solution did not fix the problem. There was no "Enable S3TC..." option in the Image Quality tab.
I think I am using Nouveau driver and I wonder if I should switch to the Nvidia driver?
Computer: Dell Precision M6400
Processor: Intel® Core™2 Duo CPU T9550 @ 2.66GHz × 2
Ubuntu: 12.0.4 LTS
Video Card: NVIDIA Quadro FX 2700M
Graphics: Gallium 0.4 on NV94
Any ideas?
Thanks.
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