[Bug 76211] [hsw] i915 resume latency 1200ms

[bugzilla-daemon at bugzilla.kernel.org]

https://bugzilla.kernel.org/show_bug.cgi?id=76211

--- Comment #16 from Len Brown <lenb at kernel.org> ---
Lenovo Yoga2 Pro had no problems booting the same kernel binary
(built from kernel in comment #11)
that the Dell XPS11 struggled with.
I rebooted the Yoga2 5 times w/ no issues.

suspend/resume also worked fine on the Yoga2.
i915 supsend time was 277ms, resume time not visible
(/me wonders if we should add trace points to this patch
 so that analyze_suspend can see when the i915 does this work).

Though stable, the Yoga2 277ms is considerably slower than on the Dell XPS11,
which suspended in 115ms.  Further, this 277ms is the long-pole
in suspend on the Yoga2, with the next slowest parallel device
taking 25ms.

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