Thanks Luke, I appreciate your patience.
I now retested with 8 speakers connected and tested both alsa and pulseaudio behaviour since its inconsistent.
Alsa issues (test with speaker-test -Dplug:surround71 -c8 -twav):
green (Headphone/Front) jack: works properly and plays Front Left and Front Right
grey (Line Out/Surround) jack: plays Front Left and Front Right duplicating the green jack instead of Side Left and Side Right.
blue (Rear) jack: nothing. It should play Rear Right and Rear Left.
pink (Mic In/Center/Subwoofer) jack: nothing. It should play the Center and LFE.
pulseaudio issues (test with speaker-test -Dpulse -c8 -twav):
speaker-test -Dpulse -c8 -l1 -twav
green (Headphone/Front) jack & grey (Line Out/Surround) jack: Both plays
0 - Front Left,
4 - Center
1 - Front Right
7 - Side Right
3 - Rear Right
2 - Rear Left
6 - Side Left
blue (Rear) jack: nothing. It should play Rear Right and Rear Left.
I also tested pulseaudio with option default-sample-channels = 8 instead of the default 2 but it doesn't make a difference.
Beside those bugs there is no alsamixer sliders to control the surround channel levels separately. If this info is enough please change the Incomplete status of the bug.
Thanks Luke, I appreciate your patience.
I now retested with 8 speakers connected and tested both alsa and pulseaudio behaviour since its inconsistent.
Alsa issues (test with speaker-test -Dplug:surround71 -c8 -twav): Subwoofer) jack: nothing. It should play the Center and LFE.
green (Headphone/Front) jack: works properly and plays Front Left and Front Right
grey (Line Out/Surround) jack: plays Front Left and Front Right duplicating the green jack instead of Side Left and Side Right.
blue (Rear) jack: nothing. It should play Rear Right and Rear Left.
pink (Mic In/Center/
pulseaudio issues (test with speaker-test -Dpulse -c8 -twav):
speaker-test -Dpulse -c8 -l1 -twav
green (Headphone/Front) jack & grey (Line Out/Surround) jack: Both plays
0 - Front Left,
4 - Center
1 - Front Right
7 - Side Right
3 - Rear Right
2 - Rear Left
6 - Side Left
blue (Rear) jack: nothing. It should play Rear Right and Rear Left. sample- channels = 8 instead of the default 2 but it doesn't make a difference.
I also tested pulseaudio with option default-
Beside those bugs there is no alsamixer sliders to control the surround channel levels separately. If this info is enough please change the Incomplete status of the bug.