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

If you're experiencing failures during boot, it's plausible that GPU
freezes could certainly cause that.  The way to be sure is to ssh into
the box when it's frozen and collect dmesg and
/sys/kernel/debug/dri/0/i915_error_state.  The dmesg will have something
about "gpu hung" or "page table error" or other such errors, and
i915_error_state will have a bunch of random numbers; if it just has
zeros or is missing or empty, then your boot failure was due to
something other than a GPU lockup.  If you can't ssh into the box when
it's frozen, that also indicates something other than a GPU lockup.

This particular lockup bug report indicates that the freeze was a
temporary one and the kernel was able to reset the GPU and keep going.
There's not much in your logs after this happened, so I can't tell if
you got a usable session in this case.  But the
i915_report_and_clear_eir...masking generally indicates a false gpu
lockup.

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

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https://bugs.launchpad.net/bugs/1153712

Title:
  [gm45] False GPU lockup  EIR: 0x00000010 PGTBL_ER: 0x00000003

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