[alsa-devel] [bisected] snd_hda_intel, 2.6.37: automuting on headphone connect broken; headphone connecter no longer shown in userspace

[Takashi Iwai]

At Wed, 5 Jan 2011 13:07:41 +0530,
Nirbheek Chauhan wrote:
> 
> Hello,
> 
> Upon upgrading to 2.6.37,
> auto-muting-laptop-speakers-on-headphone-connect stopped working, and
> the headphone connector completely disappeared from alsamixer as well
> as the pulseaudio volume control panel. The headphone jack was still
> transmitting sound, though.
> 
> I bisected the problem, with 'good' being v2.6.36, and found the
> commit below as the first bad commit. Reverting it on v2.6.37 fixes
> the problem. I also tried the latest alsa-kernel master git tree,
> which had the same problem.
> 
> alsa-info when 'good':
> 
> http://www.alsa-project.org/db/?f=a0b5c95f764a0b01746be46f989685996e1f9210
> 
> alsa-info when 'bad':
> 
> http://www.alsa-project.org/db/?f=30f30ca5461f03b98ab6c7c611cf24ea4526f537
> 
> Note: both were taken without X running, before pulseaudio came up.
> 
> ================
> 03642c9a444079aa13f0864383a8f9ca04bfd198 is the first bad commit
> commit 03642c9a444079aa13f0864383a8f9ca04bfd198
> Author: Takashi Iwai <tiwai at suse.de>
> Date:   Wed Sep 8 15:28:19 2010 +0200
> 
>     ALSA: hda - Clear left-over hp_pins in snd_hda_parse_pin_def_config()
> 
>     In snd_hda_parse_def_config(), some unused values may remain in hp_pins[]
>     array during the headphone-reassignment workaround.  This patch clears
>     the unused array members.
> 
>     Signed-off-by: Takashi Iwai <tiwai at suse.de>
> 
> :040000 040000 34724336a75f74263423f28d64450d65e5ed948d
> 8d136fce8661ad2df35ac3c4a9ca1c712c9833ed M	sound
> 
> ================

It seems that the driver worked casually in the earlier versions :)
Does the patch below fix your problem?

Note that the "Headphone" control will still not appear even with this
patch, but these two outputs are controlled by "Front" and "Surround"
controls.  The lack of "Headphone" is no regression but simply it
shouldn't have been there.

I'll work on 2.6.38 tree for better handling of multi headphone
cases.


thanks,

Takashi

===
From b2d0576055bd1cafcd91a23cf85064815f1396cd Mon Sep 17 00:00:00 2001
From: Takashi Iwai <tiwai at suse.de>
Date: Mon, 10 Jan 2011 14:47:35 +0100
Subject: [PATCH] ALSA: hda - Fix multi-headphone handling for Realtek codecs

When multiple headphone pins are defined without line-out pins, the
driver takes them as primary outputs.  But it forgot to set line_out_type
to HP by assuming there is some rest of HP pins.  This results in some
mis-handling of these pins for Realtek codec parser.  It takes as if
these are pure line-out jacks.

Signed-off-by: Takashi Iwai <tiwai at suse.de>
Cc: <stable at kernel.org>
---
 sound/pci/hda/hda_codec.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 98b6d02..05e5ec8 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -4571,6 +4571,9 @@ int snd_hda_parse_pin_def_config(struct hda_codec *codec,
 		}
 		memset(cfg->hp_pins + cfg->hp_outs, 0,
 		       sizeof(hda_nid_t) * (AUTO_CFG_MAX_OUTS - cfg->hp_outs));
+		if (!cfg->hp_outs)
+			cfg->line_out_type = AUTO_PIN_HP_OUT;
+
 	}
 
 	/* sort by sequence */
-- 
1.7.3.4