On 03/15/2016 12:49 PM, Takashi Iwai wrote:
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
Bringing this back again, the command that makes it work is
hda-verb /dev/snd/hwC0D0 0x10 SET_POWER 0x00
And this is still needed as of 4.5.4
Takashi
Thanks,
Laura
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