[alsa-devel] ALSA HDMI output not detected

[samuelchemla at orange.fr]

Hi,

there is no ELD file in /proc/asound nor /proc/asound/card0
On the EDID side, do you mean any EDID from any HDMI screen ?
I thought EDID file was screen dependant.
I know the screen is HDMI sound capable because I am using it with a 
raspberry without problem... :-)

Regards,
Sam

On 23/10/2014 18:14, Takashi Iwai wrote:
> At Wed, 22 Oct 2014 19:46:58 +0200,
> samuelchemla at orange.fr wrote:
>> Hi guys,
>>
>> I opened a bug about HDMI sound output not detected on an NVIDIA optimus
>> laptop.
>> I don't know if HDMI sound card detection is up to ALSA, the kernel or
>> the video driver.
> Actually all of three are involved fairly tightly.
>
>> Could anyone give me a clue so the bug can be routed to its correct
>> destination?
>> Link to the bug:
>> https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1377653
> You should start checking EDID on the video side and ELD on the audio
> side.  ALSA driver shows the connection and ELD status in proc files
> and control elements.  If EDID is given, but ELD (or monitor
> connection state) isn't, usually it's a video driver problem, e.g. the
> audio register bit isn't set properly.
>
>
> Takashi