The lspci -v command should return a large amount of text. Search for
your graphic card in it (usually starts as "VGA compatible controller")
and see the "Kernel driver in use" line in the graphic card block.

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 050e
        Flags: bus master, fast devsel, latency 0, IRQ 51
        Memory at f1400000 (64-bit, non-prefetchable) [size=4M]
        Memory at e0000000 (64-bit, prefetchable) [size=256M]
        I/O ports at 4000 [size=64]
        Expansion ROM at <unassigned> [disabled]
        Capabilities: <access denied>
        Kernel driver in use: i915
        Kernel modules: i915

As you can see, in my case it's i915, and i945 seems to be the affected
driver.

-- 
You received this bug notification because you are a member of Ubuntu-X,
which is subscribed to xserver-xorg-video-intel in Ubuntu.
https://bugs.launchpad.net/bugs/981168

Title:
  [i945] Regression: Installing apps causes a terrible visual glitch on
  netbooks-- have to restart X.org.

To manage notifications about this bug go to:
https://bugs.launchpad.net/unity/+bug/981168/+subscriptions

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