[alsa-devel] possible snd_hda_intel jack-sensing issue with device 8086:1c20

[Chris Pemberton]

I looked again and the motherboard only has ONE front panel audio socket 
and the case cable has two ends - one labelled HD and the other AC97.

Hooking up the cable end labelled AC97 and setting the BIOS to AC97 
seems to be working.

On 11/12/2014 01:52 AM, Takashi Iwai wrote:
> At Tue, 11 Nov 2014 12:34:41 -0600,
> Chris Pemberton wrote:
>> CentOS 7 x86_64
>> Asus P8Z68-V motherboard
>> Realtek ALC892
>> Gnome 3 desktop
>> nVidia GTX 770 with nVidia's driver
>>
>> With BIOS set to HD for both rear and front jacks, I experience the problems I reported here:
>>
>> https://bugs.freedesktop.org/show_bug.cgi?id=86158
>>
>> Basically, sound works, but the selected output keeps auto-magically flipping from Analog-Out to Headphones and back so fast you barely hear a click..
>>
>> Tried all sorts of snd_hda_intel module options and it didn't change.
>>
>> Finally changed BIOS to set front jacks to AC97 (left rear jacks as HD) and sound works great... but no jack sensing occurs at all...
>>
>> I can live without the jack sensing... but if anyone wants a stab at a fix, I'm game.
>>
>> I've got the HDA Analyzer downloaded and running if that helps.
>>
>> My device has id 8086:1c20
>>
>> Perhaps similar to this bug that was brought to my attention?
>>
>> https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/pci/hda?id=1565cc358585be40608b46f18f7ac431a1aae2bc
>>
>> Output of alsa-info.sh is here:
>>
>> http://www.alsa-project.org/db/?f=8cf116b0bc230524bcfa7285b2adb698078d4224
> Could you check the pin connection again?  The symptom appears more like
> a hardware problem.
>
>
> Takashi