[Bug 103556] [SKL] Unigine Heaven 4.0 fails to GPU hangs

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=103556

--- Comment #16 from Eero Tamminen <eero.t.tamminen at intel.com> ---
Created attachment 143723
  --> https://bugs.freedesktop.org/attachment.cgi?id=143723&action=edit
SKL GT4e error state (drm-tip 5.0 kernel, Mesa 158d45db0c)

During last 4 nights, with 3 runs of Heaven each day:
- with different kernel upstream commits, rest of gfx stack 2 weeks old
- with latest Mesa upstream commits (rest of gfx stack 2 weeks old)
- whole gfx stack using latest upstream commits

Each of these setups had 1 Heaven GPU hang, out of total 12 runs.
=> Mesa TS/GS perf fix not relevant for hangs


(In reply to Lionel Landwerlin from comment #12)
> Created attachment 143681 [details] [review]
> i965: align 3DSTATE_TE emission on 3DSTATE_DS/GS
> 
> Thanks for the error states Eero.
> Can I bother you with running this simple patch? Might fix it, not sure...

21 successive rounds of Heaven went without hangs so it looks good, but I don't
know whether there's some pre-condition before the hang happens.

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