[LAU] Hint for people with no HDMI sound.
james at mansionfamily.plus.com
Sun Nov 29 10:56:11 UTC 2015
I have a PC with an AMD APU chip, and I'm trying to send sound to my
Audiolab 8200AP processor over HDMI.
The system is 'Ubuntu Studio 15.10'.
I believe the hardware works - I can boot into Windows 10 and send audio
With Linux, however:
- aplay -L does list the hdmi:Generic device, and pulse is using it
- Pulse Audio volume control does detect whether the HDMI cable is
plugged in at both ends
- speaker_test -c 8 -D pulse loops continuously and thinks its playing
- Pulse Audio volume control shows the ALSA plug-in [speaker-test] stream
However, the Audiolab is stubbornly said the channel is 'silent' on its
And then I used 'Settings/Display' to select the 'IAG 6"' and select
'use this display' and to mirror the displays - the computer is actually
displaying on an attached VGA monitor.
And that made things start to work.
Ideally I would only access the system over xrdp - but you can't enable
the extra monitor without being on the console.
Quite possibly I would not have had the issue if either the display was
running through HDMI or the VGA monitor was not plugged in - but it is
worth bearing in mind if you are having issues.
I guess it would be handy if the display on the volume control could
indicate 'plugged in but output is inactive' - or (better still) if the
HDMI output were active if either the display or sound system wants to
use it, and the display is just an unchanged or black background.
More information about the Linux-audio-user