[Bug 107945] System crashes seconds after a GPU hang with kernel newer than 4.18

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=107945

--- Comment #16 from leozinho29_eu at hotmail.com ---
Created attachment 142413
  --> https://bugs.freedesktop.org/attachment.cgi?id=142413&action=edit
The error when building the kernel with the commit reverted

Reverting that commit makes the kernel impossible to build, probably I would
need to revert multiple commits to make the kernel possible to build again.

Every kernel from the bisect was tested: I would reproduce a GPU hang,
https://bugs.freedesktop.org/show_bug.cgi?id=108531 was reliable to cause a GPU
hang, then I would use the computer normally, it could crash after a few
seconds or after a few minutes. If it did not crash after 1 hour, I would start
an iGVT-g guest to put a significant load in the computer.

As the GPU hang was a different bug, which seems fixed (thank you), the
criteria was:

GPU hang and crash later: bad;
GPU hang and don't crash: good

It seems:

[7d3c425fefb91da7e984a43ba27dff6cdd53758a] drm/i915: Move a bunch of
workaround-related code to its own file

Is the last commit before the bad commit.

In comment 5 I have test results with intel_iommu=igfx_off, and using this
option the system crashes too.

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