On 03/16/2015 12:10 PM, Jason Ekstrand wrote:

On Mon, Mar 16, 2015 at 7:29 AM, Mario Limonciello
[off-list ref] wrote:
It's nothing about the wireless.  I swapped it out for an intel card
on day 3 or so.

Yes, I am almost 100% sure that this affects suspend/resume.  Prior to
the _REV hack, my laptop *never* suspended correctly.  Now it
regularly suspends just fine.  I also double-checked that rebasing on
Linus' master didn't affect it.  With the _REV hack it doesn't
suspend.  Without it, it's just fine.

I don't know much about suspend/resume but is it possible that the
problem is the kernel not being able to properly shut down the sound
card?

Thanks for that confirmation.  That does sound like a very likely candidate that it was because the audio device was in the wrong state.

That matches what I've seen.  With the _REV hack, I see nothing about
HDA in dmesg and I get different audio messages than with an _OSI of
Windows 2009.

I look forward to seeing the update.  Thanks for working on this!
--Jason Ekstrand

Sure.  In in the interim, here is the patch you can apply to your local DSDT and put in the initramfs to see what it will look like w/ A02.  This will leave the touchpad in I2C and audio in HDA.

--- DSDT.A01    2015-02-18 18:12:44.891286890 -0600
+++ DSDT.A02    2015-03-03 23:17:24.075746660 -0600

@@ -21567,6 +21567,7 @@
                  {
                      ACOS = 0x80
                      ACSE = Zero
+                    OSTP = One
                  }
              }
          }