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[REGRESSION] Headphones no longer working on MacPro6,1 with 4.4

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  [REGRESSION] Headphones no longer working on MacPro6,1 with 4.4 Laura Abbott <labbott@redhat.com> - 2016-03-15 20:30 +0100
    Re: [REGRESSION] Headphones no longer working on MacPro6,1 with 4.4 Takashi Iwai <tiwai@suse.de> - 2016-03-15 20:40 +0100
      Re: [REGRESSION] Headphones no longer working on MacPro6,1 with 4.4 Takashi Iwai <tiwai@suse.de> - 2016-03-15 20:50 +0100

#1358202 — [REGRESSION] Headphones no longer working on MacPro6,1 with 4.4

Hi,

We received a bug report https://bugzilla.redhat.com/show_bug.cgi?id=1316119
that the headphone jack on a MacPro6,1 stopped working on an upgrade from 4.3
to 4.4.

The bugzilla has the alsainfo, diffing shows that the Amp-Out vals are
different. I tried a revert of 9f660a1c4 (" ALSA: hda/realtek - Fix silent
headphone output on MacPro 4,1 (v2)") but that didn't help.

Any ideas before asking for a bisect? Does this hardware version need to have
the vref fixup as well?

Thanks,
Laura

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#1358205

On Tue, 15 Mar 2016 20:23:09 +0100,
Laura Abbott wrote:
> 
> Hi,
> 
> We received a bug report https://bugzilla.redhat.com/show_bug.cgi?id=1316119
> that the headphone jack on a MacPro6,1 stopped working on an upgrade from 4.3
> to 4.4.
> 
> The bugzilla has the alsainfo, diffing shows that the Amp-Out vals are
> different. I tried a revert of 9f660a1c4 (" ALSA: hda/realtek - Fix silent
> headphone output on MacPro 4,1 (v2)") but that didn't help.
> 
> Any ideas before asking for a bisect? Does this hardware version need to have
> the vref fixup as well?

The obvious difference is the power state of each node.  The recent
kernel has the finer power saving mode, and this might be the cause --
Mac has some secret that requires some node to be powered up.

Try to power on each node via hda-verb.  For example, to power up the
node 0x05, run like:
  hda-verb /dev/snd/hwC0D0 0x05 SET_POWER 0x01

And check whether it makes any difference.
Similarly, try for nodes 0x06, 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d,
0x0f, 0x10, 0x11, 0x14, 0x15, 0x16, 0x17, 0x18.


thanks,

Takashi

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#1358208

On Tue, 15 Mar 2016 20:38:41 +0100,
Takashi Iwai wrote:
> 
> On Tue, 15 Mar 2016 20:23:09 +0100,
> Laura Abbott wrote:
> > 
> > Hi,
> > 
> > We received a bug report https://bugzilla.redhat.com/show_bug.cgi?id=1316119
> > that the headphone jack on a MacPro6,1 stopped working on an upgrade from 4.3
> > to 4.4.
> > 
> > The bugzilla has the alsainfo, diffing shows that the Amp-Out vals are
> > different. I tried a revert of 9f660a1c4 (" ALSA: hda/realtek - Fix silent
> > headphone output on MacPro 4,1 (v2)") but that didn't help.
> > 
> > Any ideas before asking for a bisect? Does this hardware version need to have
> > the vref fixup as well?
> 
> The obvious difference is the power state of each node.  The recent
> kernel has the finer power saving mode, and this might be the cause --
> Mac has some secret that requires some node to be powered up.
> 
> Try to power on each node via hda-verb.  For example, to power up the
> node 0x05, run like:
>   hda-verb /dev/snd/hwC0D0 0x05 SET_POWER 0x01

Oops, a typo: the last argument must be 0x00, corresponding to D0:
    hda-verb /dev/snd/hwC0D0 0x05 SET_POWER 0x00


Takashi

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