Bug 91471

The analysis of Raymond Yau (alsa dev) based on my pulseaudio log. Maybe this helps to find the cause and solution.


(   6.509|   1.381) D: [pulseaudio] module-alsa-card.c: Jack 'Headphone Mic Jack' is now plugged in
(   6.509|   0.000) D: [pulseaudio] device-port.c: Setting port analog-output-headphones to status yes

This look like pulseaudio use headphone mic jack to set the headphone to available

(   6.509|   0.000) D: [pulseaudio] module-switch-on-port-available.c: Finding best profile
(   6.509|   0.000) D: [pulseaudio] module-switch-on-port-available.c: No suitable profile found
(   6.509|   0.000) D: [pulseaudio] device-port.c: Setting port analog-input-headphone-mic to status unknown

(   6.509|   0.000) D: [pulseaudio] core-subscribe.c: Dropped redundant event due to change event.
(   6.509|   0.000) D: [pulseaudio] device-port.c: Setting port analog-input-headset-mic to status unknown

But I don't understand why pulseaudio set status of headphone mic and headset mic to unknown

You did not use External Subwoofer Jack to change the status of external subwoofer, there is no traces of external subwoofer jack in your log

can you post the channel matrix in pulseaudio verbose log when you select surround40  profile and play

a) stereo
b) speaker test -c4 -t wav -Dpulse

since your chamnel map does not contain RL and RR , the channel matrix can not be an identity 4*4 martix

Situation: alienware-patch applied to kernel 4.2.0-rc5, external subwoofer, headset or headphones are not plugged in.

Test a)

Stop and start pulseaudio with verbose logging
Verify that the Surround4.0 with Analog Input profile is selected in pavucontrol
Play music with Audacious
Stop music play

Result of grep matrix pulseverbose.log -C7:

(   4.258|   0.000) I: [pulseaudio] resampler.c: Forcing resampler 'copy', because of fixed, identical sample rates.
(   4.258|   0.000) D: [pulseaudio] resampler.c: Resampler:
(   4.258|   0.000) D: [pulseaudio] resampler.c:   rate 44100 -> 44100 (method copy)
(   4.258|   0.000) D: [pulseaudio] resampler.c:   format s16le -> s16le (intermediate s16le)
(   4.258|   0.000) D: [pulseaudio] resampler.c:   channels 2 -> 4 (resampling 2)
(   4.258|   0.000) D: [pulseaudio] resampler.c: Channel matrix:
(   4.258|   0.000) D: [pulseaudio] resampler.c:        I00   I01 
(   4.258|   0.000) D: [pulseaudio] resampler.c:     +------------
(   4.258|   0.000) D: [pulseaudio] resampler.c: O00 | 1.000 0.000
(   4.258|   0.000) D: [pulseaudio] resampler.c: O01 | 0.000 1.000
(   4.258|   0.000) D: [pulseaudio] resampler.c: O02 | 1.000 0.000
(   4.258|   0.000) D: [pulseaudio] resampler.c: O03 | 0.000 1.000

Test b)

Stop and start pulseaudio with verbose logging
Verify that the Surround4.0 with Analog Input profile is selected in pavucontrol
Play sound with speaker test -c4 -t wav -Dpulse
Wait for test to finish
Stop pulseaudio

Result of speaker-test

speaker-test 1.0.29

Playback device is pulse
Stream parameters are 48000Hz, S16_LE, 4 channels
WAV file(s)
Rate set to 48000Hz (requested 48000Hz)
Buffer size range from 48 to 524288
Period size range from 16 to 174763
Using max buffer size 524288
Periods = 4
was set period_size = 131072
was set buffer_size = 524288
 0 - Front Left
 1 - Front Right
 3 - Rear Right
 2 - Rear Left
Time per period = 5.896920

Result of grep matrix pulseverbose.log -C7

<returns nothing>

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This bug has been migrated to freedesktop.org's GitLab instance and has been closed from further activity.

You can subscribe and participate further through the new bug through this link to our GitLab instance: https://gitlab.freedesktop.org/pulseaudio/pavucontrol/issues/17.