Comment 13 for bug 772925

I am having the same issue on a Dell Latitude e5520m running Ubuntu 11.04 with gnome classic (I did not test this using Unity).

00:02.0 VGA compatible controller: Intel Corporation 2nd Generation Core Processor Family Integrated Graphics Controller (rev 09) (prog-if 00 [VGA controller])
 Subsystem: Dell Device 049a
 Flags: bus master, fast devsel, latency 0, IRQ 42
 Memory at e2800000 (64-bit, non-prefetchable) [size=4M]
 Memory at d0000000 (64-bit, prefetchable) [size=256M]
 I/O ports at 8000 [size=64]
 Expansion ROM at <unassigned> [disabled]
 Capabilities: <access denied>
 Kernel driver in use: i915
 Kernel modules: i915