[Bug 75789] [BDW] pm_pc8: PC8 subtests fail

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=75789

lu hua <huax.lu at intel.com> changed:

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

--- Comment #7 from lu hua <huax.lu at intel.com> ---
(In reply to comment #6)
> Hi
> 
> Please go to the BIOS, Intel Advanced Menu -> Power and Performance -> CPU
> Power Management Control -> Package C state Limit, then set it to "C10".
> 
> Then test this tree:
> http://cgit.freedesktop.org/~pzanoni/linux/log/?h=bdw-pc8-fixes . Don't
> forget to switch to the bdw-pc8-fixes branch.
> 
> Please also boot with drm.debug=0xe and send the dmesg output in case
> there's any problem.
> 
> Thanks,
> Paulo

It still fails.

output:
IGT-Version: 1.7-g7ef5372 (x86_64) (Linux: 3.16.0-rc2_kcloud_619f97_20140701+
x86_64)
Runtime PM support: 1
PC8 residency support: 1
Test assertion failure function pc8_residency_subtest, file pm_rpm.c:734:
Last errno: 2, No such file or directory
Failed assertion: pc8_plus_residency_changed(120)
Machine is not reaching PC8+ states, please check its configuration.
Subtest pc8-residency: FAIL

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