[Bug 48791] i915 doesn't reach RC6 state after s2ram - Thinkpad T420, X220

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=48791





--- Comment #14 from Thomas Kahle <tomka at gentoo.org>  2013-01-30 19:17:58 ---
Interestingly I reproduced the issue with my "backup" kernel 3.4.24 too.  With
this kernel powertop does not show the rc6 state, but it seems very likely that
this is the same issue:  On a small fraction of resumes the power usage spikes
(20W instead of 9W) and going through another suspend/resume cycle solves the
problem (with reasonable probability).

If anyone tells me what to do to narrow it down further, I'll be happy to help.
Because of the low frequency with which the problem happens, bisecting seems to
be out of reach.

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