[alsa-devel] Internal speakers not working on HP ProBook 455 G2

[Michel Dänzer]

On 28.02.2015 16:58, Takashi Iwai wrote:
> At Sat, 28 Feb 2015 15:03:41 +0900,
> Michel D4nzer wrote:
>>
>> On 24.02.2015 18:05, Takashi Iwai wrote:
>>> At Tue, 24 Feb 2015 17:43:10 +0900,
>>> Michel D4nzer wrote:
>>>> On 19.02.2015 20:38, Takashi Iwai wrote:
>>>>> At Thu, 19 Feb 2015 15:24:15 +0900,
>>>>> Michel D4nzer wrote:
>>>>>>
>>>>>> the built-in speakers of my HP ProBook 455 G2 are not working by
>>>>>> default. I'm attaching the output of alsa-info.sh.

[...]

>>>> In Linux, I haven't seen any visible change when plugging in or out the
>>>> headphones.
>>>
>>> You can watch the output of "alsactl monitor".
>>
>> When plugging in headphones:
>>
>> card 1, #38 (0,0,0,Mic Jack,0) VALUE
> 
> So, your headphone is recognized wrongly as a microphone.

Actually, there are two pins for the (black) headphone jack, which BTW
has a headset icon next to it. Maybe some kind of headset quirk is
needed, or maybe one of the jacks should be gated by the other one?


> This implies that the pins aren't properly set up by BIOS.  Maybe BIOS
> update will solve this?
> 
> If no BIOS update doesn't solve (or you don't want it),

I already have the latest BIOS version.


> you have to figure out the right pin configuration by trial and error.
> hdajackretask and hda-analyzer would be your friend. 

I've been playing around with them, but I don't really know what I'm
doing, and I haven't had much luck yet.


Something else I've noticed in the meantime: With inv_jack_detect
enabled, I can get sound from the speakers by choosing them for output
in the GNOME sound preferences. If I choose "Analog Output - Built-in
Audio" there, the sound comes out of the connected headphones.


-- 
Earthling Michel Dänzer               |               http://www.amd.com
Libre software enthusiast             |             Mesa and X developer