module-hal-detect fails to handle 5.1 sound card with default-sample-channels=6

[atrus]

Setting up a 5.1 usb sound card with pulseaudio. In order to get it to do 5.1, default-sample-channnels is set to 6 in daemon.conf.

Configuring the card with:

load-module module-alsa-sink sink_name=usb_out device=surround51:1 channels=6

Results in a 6channel device visible in paman. However, allowing module-hal-detect to catch the card still produces a 2 channel device in paman, regardless of the default-sample-channels setting.

Attached are logs from pulseaudio -vv under the manual and hal configurations, respectively.

[atrus]

pulseaudio --vv under manual configuration

[atrus]

pulseaudio -vv under hal configuration

[lennart]

Due to some reason the ALSA device refused the hw parameters PA wanted to set. I am not sure why. Please use "aplay -v -D surround51:1 /dev/urandom" to find out what the native format of your USB audio device is. Paste the output here.

[lennart]

Hmm, is it possible that the order in which sink and source are initialized is relevant to this bug? i.e. HAl seems to initialize the source front:0 first. Which works. And then the sink surround51:0 is initialized, which fails.

However, when you manually configured it you didn't configure a source at all. In which case surround51 did work. Do you have one of those devices which use the same plug for the rear channels and the recording channels?

[lennart]

4 months without reply. Closing.