I am experiencing the same issue with Intel driver 2:2.1.1-0ubuntu3 and i915GM on Ubuntu Gutsy Gibbon. This doesn't happen with i810 driver.
Hardware: Sony Vaio TX2 00:02.0 VGA compatible controller: Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller (rev 03)
I am experiencing the same issue with Intel driver 2:2.1.1-0ubuntu3 and i915GM on Ubuntu Gutsy Gibbon.
This doesn't happen with i810 driver.
Hardware:
Sony Vaio TX2
00:02.0 VGA compatible controller: Intel Corporation Mobile 915GM/GMS/910GML Express Graphics Controller (rev 03)