*** This bug is a duplicate of bug 1155609 ***
    https://bugs.launchpad.net/bugs/1155609

>From your logs it looks like the external monitor has invalid EDID,
which accounts for the flickering.  Use xedid or similar to override the
EDID.

As to the GPU lockup, I gather it continued working properly, without
having a hard freeze.  So this is a dupe of the false gpu bug.

** This bug has been marked a duplicate of bug 1155609
   False GPU lockup  EIR: 0x00000010

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https://bugs.launchpad.net/bugs/1155230

Title:
  [i915gm] False GPU lockup  EIR: 0x00000010 PGTBL_ER: 0x00000100 IPEHR:
  0x01000000

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