suspend/resume regression

[Brandon J. Wandersee]

Kevin Oberman writes:

> On Sat, Jun 27, 2015 at 3:13 PM, Joseph Mingrone <jrm at ftfl.ca> wrote:
>
>> Adrian Chadd <adrian.chadd at gmail.com> writes:
>> > does it always fail now?
>>
>> Yes.  The behaviour I described is, so far with 15-20 tries, consistent.
>>
>
> I confirm that I see the similar behavior on my T520 ThinkPad, Sandy Bridge
> system.
> FreeBSD rogue 10.2-PRERELEASE FreeBSD 10.2-PRERELEASE #1 r284698: Mon Jun
> 22 09:25:11 PDT 2015     root at rogue:/usr/obj/usr/src/sys/GENERIC  amd64
>
> It has been working flawlessly since Adrian's ACPI update. As of now, it
> suspends fine, but it won't resume. I get a fan spin-up, but the power LED
> continues to pulse, indicating it is suspended and the logs show nothing
> after the suspend.

Just updated my T520 yesterday, and I get the same behavior with the
same machine here. Suspend is fine; resume fails. It seems to get a bit
farther along in the resume process if i915kms isn't loaded, though I've
got no way to really measure that. I've tried a GENERIC kernel, clean
source tree and empty src.conf, to no avail.

Several MFCs in r280434 from a couple weeks ago touched a whole bunch of
suspend/resume stuff. That might be a good place to start digging.

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   		      :: Brandon Wandersee ::
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