[Bug 80701] [BYT Bisected]igt/kms_flip subcases cause "WARNING: CPU: 0 PID: 3943 at drivers/gpu/drm/i915/intel_dp.c:3092 intel_dp_complete_link_train+0x100/0x27f [i915]()" sporadically

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=80701

Guo Jinxian <jinxianx.guo at intel.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |ASSIGNED

--- Comment #3 from Guo Jinxian <jinxianx.guo at intel.com> ---
(In reply to comment #2)
> This looks like a duplicate of bug 73037. Could you double-check that the
> bisect result is correct, that is you can't reproduce the bug on the parent
> commit (a497c3ba1d97)?

Another bug 81367 reproduced on the parent commit(a497c3ba1d97), and can not
find CallTrace on this commit.

root at x-byt06:/GFX/Test/Intel_gpu_tools/intel-gpu-tools/tests# ./kms_flip
--run-subtest plain-flip-fb-recreate-interruptible
IGT-Version: 1.7-g4d4f4b2 (x86_64) (Linux: 3.16.0-rc2_kcloud_a497c3_20140722+
x86_64)
Test assertion failure function kmstest_force_connector, file igt_kms.c:461:
Failed assertion: debugfs_fd != -1
Last errno: 2, No such file or directory
Subtest plain-flip-fb-recreate-interruptible: FAIL

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