[pulseaudio-discuss] SB Omni surround 5.1 microphone with speaker PulseAudio 8.0 not working simultaneously

[Nazar Mokrynskyi]

I'm not very lucky with this USB sound card on Linux.

After upgrade to PulseAudio 8.0 on Ubuntu 16.04 I can't use microphone 
and speakers from the this USB sound card simultaneously anymore 
(however, there is no such problem with another USB sound card which 
only supports stereo output, so problem is either specific to this sound 
card or similar sound cards with multiple modes like 2.0, 2.1, etc.).

With PulseAudio < 8.0 microphone was not available in 2.1+ modes, but 
worked fine with stereo.

Now As soon as I select microphone of SB 5.1 - Intel HDA output is 
automatically selected and selecting SB 5.1's speakers automatically 
switches microphone to Intel HDA. So basically it works like radio 
button, I can't select both microphone and output of SB 5.1 at the same 
time.

alsa-base package of version 1.0.25 and alsa-utils of version 1.1.0 as 
found in Ubuntu 16.04 at the moment.

    ~> aplay -l
    **** List of PLAYBACK Hardware Devices ****
    card 0: HDMI [HDA Intel HDMI], device 3: HDMI 0 [HDMI 0]
       Subdevices: 1/1
       Subdevice #0: subdevice #0
    card 0: HDMI [HDA Intel HDMI], device 7: HDMI 1 [HDMI 1]
       Subdevices: 1/1
       Subdevice #0: subdevice #0
    card 0: HDMI [HDA Intel HDMI], device 8: HDMI 2 [HDMI 2]
       Subdevices: 1/1
       Subdevice #0: subdevice #0
    card 1: PCH [HDA Intel PCH], device 0: ALC892 Analog [ALC892 Analog]
       Subdevices: 1/1
       Subdevice #0: subdevice #0
    card 1: PCH [HDA Intel PCH], device 1: ALC892 Digital [ALC892 Digital]
       Subdevices: 1/1
       Subdevice #0: subdevice #0
    card 2: S51 [SB Omni Surround 5.1], device 0: USB Audio [USB Audio]
       Subdevices: 1/1
       Subdevice #0: subdevice #0
    card 2: S51 [SB Omni Surround 5.1], device 1: USB Audio [USB Audio #1]
       Subdevices: 1/1
       Subdevice #0: subdevice #0
    card 2: S51 [SB Omni Surround 5.1], device 2: USB Audio [USB Audio #2]
       Subdevices: 1/1
       Subdevice #0: subdevice #0

    ~> arecord -l
    **** List of CAPTURE Hardware Devices ****
    card 1: PCH [HDA Intel PCH], device 0: ALC892 Analog [ALC892 Analog]
       Subdevices: 1/1
       Subdevice #0: subdevice #0
    card 1: PCH [HDA Intel PCH], device 2: ALC892 Alt Analog [ALC892 Alt
    Analog]
       Subdevices: 1/1
       Subdevice #0: subdevice #0
    card 2: S51 [SB Omni Surround 5.1], device 0: USB Audio [USB Audio]
       Subdevices: 1/1
       Subdevice #0: subdevice #0

Sincerely, Nazar Mokrynskyi
github.com/nazar-pc
Skype: nazar-pc
Diaspora: nazarpc at diaspora.mokrynskyi.com
Tox: A9D95C9AA5F7A3ED75D83D0292E22ACE84BA40E912185939414475AF28FD2B2A5C8EF5261249

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