[alsa-devel] Dell XPS 13 (Codec: IDT 92HD73C1X5) and 3 stereo jack output

[Ruben Van Boxem]

2011/5/30 Ruben Van Boxem <vanboxem.ruben at gmail.com>:
> 2011/5/29 Ruben Van Boxem <vanboxem.ruben at gmail.com>:
>> Hi,
>>
>> I have been trying to get my Dell XPS 13 to output 5.1 sound through
>> the stereo jacks (because the NVIDIA HDMI only does 2.1). Attached is
>> alsa-info output. I can't seem to be able to set the Line/Mic In to
>> output.
>>
>> I have tried several things, going from fiddling with Kmix to fiddling
>> with the modprobe "model=" parameter, and even looking through the
>> hda_analyzer.py output. This last one lifted a tiny corner of the
>> solution, but I don't think a vanilla Alsa install will get me through
>> this.
>>
>> In Windows, I can use the three jacks to output 2 channels each, so I
>> am sure the hardware is capable of it. In HDA analyzer I can see that
>> there are several "Line Out" entries, but since they all have the node
>> cap "Unsolicited Capabilities", I'm pretty sure the problem is alsa
>> not knowing about the, well, capabilities.
>>
>> I searched the web and documentation for anything sane to try, but
>> nothing worked. The default modprobe "model=" is the best (I can get
>> 4.0 output from the jacks, and everything works, except the third
>> jack).
>>
>> If you need more input or information, please ask, I'm very willing to
>> get this solved!
>>
>> Thanks,
>>
>> Ruben
>>
>
> I have been able to produce output from the third jack fiddling with
> hda_analyzer. The diff is attached. I'm sure it is far from optimal,
> but at least shows which pin needs modification. Plugging into the
> jack won't mute the speakers, but I guess it needs the same settings
> as the first two jacks (which do mute the speaker). With this
> modification, I get the same output from the right jack as from the
> left jack (meaning the front left and front right channels of a 5.1
> setup).
>
> I would dare to suggest a new "model" modprobe parameter, but that's
> even more above my head. I will be sure to test any changes or
> suggestions, and keep at it, but I hope someone will jump in and nudge
> me into the right direction.
>
> Thanks!
>
> Ruben
>

I will take this occasion to point to the bug report on this issue,
which has been around for a while.

https://bugtrack.alsa-project.org/alsa-bug/view.php?id=4546

I think the second anniversary is a nice time to help us poor users
get this annoying issue fixed.

Thanks!

Ruben