08.12.2014 19:40, bencoxdev@gmail.com wrote:
Hi Alexander, Thanks for looking at this for me it is very much appreciated. Please see below the details from the all the logs; as you requested. I’ve had to omit a few details (vendor names and ID’s) as this project is pre-release and I am under N.D.A.
Unfortunately, you have leaked both the graphics vendor (through excessive blocking of it) and the TV/monitor vendor (through ELD). So you both broke the NDA and prevented me from troubleshooting further. I thought I needed the vendor IDs in order to match them against udev rules, but see below. Still, a fail-fail situation, especially since there are a lot of other hobby projects using development boards with the graphics and audio chips from the same vendor.
But indeed, there is information in the log that gives a big clue. You are using PulseAudio 1.1, and configured it not to use udev rules (so knowledge of a vendor ID is now useless). Also, it cannot autodetect 5.1 PCM over HDMI with udev rules. It is also not supported anymore. My recommendation would be to either upgrade (which is impossible on the Ubuntu 12.04 platform) or to drop the use of PulseAudio altogether if you are stuck with this ancient userspace.
For enabling passthrough in PulseAudio, you would need to run pavucontrol and place a checkbox in the AC3 and DTS fields. Alternatively:
pactl set-sink-formats 0 'pcm;ac3-iec61937;dts-iec61937'
...where 0 is the sink index.
And also you need to find a player that supports this passthrough feature, and, if you are using GStreamer, also to make sure that the installed version supports passthrough. On such ancient platform, I'd recommend against it.
For PCM 5.1 (i.e. software decoding) with PulseAudio 1.1, you need a real 5.1 receiver and this command:
pacmd load-module module-alsa-sink device=hdmi:0,0 channels=6
Using pasuspender -- speaker-test -c6 -b 125000 -P2 -D "plug:'hdmi:X,Y'" X Y Result
0 0 Hiss left Front and Right Front, others silent (everything else) Playback open error: -2, No such file or directory
Try retesting plug:'hdmi:0,0' with a real 5.1 HDMI receiver (e.g. from Onkyo), not with a Samsung TV/monitor (that only advertises the presence of Front-Left and Front-Right channels and LPCM encoding in the ELD).