[coreboot] i945: 6718 PTE (page table error) report

[The Gluglug]

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A while ago I was asked by Paul to check if PTE errors still exist on
i945 (X60 tested here) related to i945 native graphics, when including
6718. That patch is now merged and I can confirm that they do still
exist.

Posting to list because it may be useful for others.

http://dev.libreboot.org/docs/future/dumps/pte_x60_6718/dmesg
http://dev.libreboot.org/docs/future/dumps/pte_x60_6718/kern.log

Snippet from kernel log:

Aug 31 22:50:24 minifree kernel: [    1.180448] vgaarb: device changed
decodes: PCI:0000:00:02.0,olddecodes=io+mem,decodes=io+mem:owns=io+mem
Aug 31 22:50:24 minifree kernel: [    1.180450] i915: render error
detected, EIR: 0x00000010
Aug 31 22:50:24 minifree kernel: [    1.180452] i915: page table error
Aug 31 22:50:24 minifree kernel: [    1.180454] i915:   PGTBL_ER:
0x00000012
Aug 31 22:50:24 minifree kernel: [    1.180457]
[drm:i915_report_and_clear_eir] *ERROR* EIR stuck: 0x00000010, masking
Aug 31 22:50:24 minifree kernel: [    1.180463]
[drm:i915_irq_handler], pipe B underrun
Aug 31 22:50:24 minifree kernel: [    1.180469] i915: render error
detected, EIR: 0x00000010
Aug 31 22:50:24 minifree kernel: [    1.180471] i915: page table error
Aug 31 22:50:24 minifree kernel: [    1.180473] i915:   PGTBL_ER:
0x00000012
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