Running intel_error_decode on the attached i915_error_state.txt shows
that there is a page table error and that the ringbuffer is completely
empty:
Time: 1280551135 s 109870 us
PCI ID: 0x27a2
EIR: 0x00000010
PGTBL_ER: 0x00000001
INSTPM: 0x00000000
IPEIR: 0x00000000
IPEHR: 0x00000000
INSTDONE: 0x7fffffc0
busy: Secondary ring 3
busy: Secondary ring 2
busy: Secondary ring 1
busy: Secondary ring 0
busy: Primary ring 1
busy: Primary ring 0
ACTHD: 0x00000000
seqno: 0x00000000
ringbuffer at 0x0d4b8000:
0x0d4b8000: 0x00000000: MI_NOOP
0x0d4b8004: 0x00000000: MI_NOOP
0x0d4b8008: 0x00000000: MI_NOOP
....
0x0d4d7ff4: 0x00000000: MI_NOOP
0x0d4d7ff8: 0x00000000: MI_NOOP
0x0d4d7ffc: 0x00000000: MI_NOOP
** Summary changed:
- [i945gm] GPU lockup d0c69edf
+ [i945gm] GPU lockup d0c69edf (PGTBL_ER: 0x00000001)
--
[i945gm] GPU lockup d0c69edf (PGTBL_ER: 0x00000001)
https://bugs.launchpad.net/bugs/611951
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