Comment 9 for bug 793144

Output of,
 lspci -v -s `lspci | awk '/VGA/{print $1}'`
00:02.0 VGA compatible controller: Intel Corporation 4 Series Chipset Integrated Graphics Controller (rev 03) (prog-if 00 [VGA controller])
 Subsystem: Hewlett-Packard Company Device 3034
 Flags: bus master, fast devsel, latency 0, IRQ 47
 Memory at f0000000 (64-bit, non-prefetchable) [size=4M]
 Memory at e0000000 (64-bit, prefetchable) [size=256M]
 I/O ports at 1250 [size=8]
 Expansion ROM at <unassigned> [disabled]
 Capabilities: <access denied>
 Kernel driver in use: i915
 Kernel modules: i915

I have changed to 'Ubuntu Classic' I need to check if it has fixed after running for couple of days.