Bug 101973

Summary:	Selection of a card profile does not correctly set card's input
Product:	PulseAudio	Reporter:	Denis Shulyaka <Shulyaka>
Component:	alsa	Assignee:	pulseaudio-bugs
Status:	RESOLVED FIXED	QA Contact:	pulseaudio-bugs
Severity:	normal
Priority:	medium	CC:	lennart
Version:	unspecified
Hardware:	ARM
OS:	Linux (All)
Whiteboard:
i915 platform:		i915 features:

Description Denis Shulyaka 2017-07-30 19:10:17 UTC

Hi,

Short: I can't configure PA by setting card profile to record from SPDIF-In instead of analog input.

Long:
I have a USB sound card reported by lsusb as "0d8c:0102 C-Media Electronics, Inc. CM106 Like Sound Device". The card has several input sources, which can be managed by alsa:

[root@speaker ~]# amixer -c 2 get 'PCM Capture Source'
Simple mixer control 'PCM Capture Source',0
  Capabilities: enum
  Items: 'Mic' 'Line' 'IEC958 In' 'Mixer'
  Item0: 'IEC958 In'

Pulseaudio lists two input sources with 'pactl list cards' command (input:analog-stereo and input:iec958-stereo), however selection of the card profile always reset this to Mic:

[root@speaker ~]# amixer -c 2 set 'PCM Capture Source' 'IEC958 In'
Simple mixer control 'PCM Capture Source',0
  Capabilities: enum
  Items: 'Mic' 'Line' 'IEC958 In' 'Mixer'
  Item0: 'IEC958 In'
[root@speaker ~]# pactl set-card-profile 0 output:analog-surround-51+input:analog-stereo
[root@speaker ~]# amixer -c 2 get 'PCM Capture Source'
Simple mixer control 'PCM Capture Source',0
  Capabilities: enum
  Items: 'Mic' 'Line' 'IEC958 In' 'Mixer'
  Item0: 'Mic'
[root@speaker ~]# pactl set-card-profile 0 output:analog-surround-51+input:iec958-stereo
[root@speaker ~]# amixer -c 2 get 'PCM Capture Source'
Simple mixer control 'PCM Capture Source',0
  Capabilities: enum
  Items: 'Mic' 'Line' 'IEC958 In' 'Mixer'
  Item0: 'Mic'
[root@speaker ~]# pulseaudio --version
pulseaudio 10.0

I can also confirm by listening that after setting the card profile to "output:analog-surround-51+input:iec958-stereo" the parecord command still records from analog input instead of SPDIF, unless I reconfigure it again with amixer.

Comment 1 Tanu Kaskinen 2017-08-03 06:21:54 UTC

Hmm, the profile configuration references path iec958-stereo-input, but that path doesn't actually exist (in form of a configuration file).

Can you try creating /usr/share/pulseaudio/alsa-mixer/paths/iec958-stereo-input.conf with the following contents:

[Element PCM Capture Source]
enumeration = select

[Option PCM Capture Source:IEC958 In]
name = iec958-input

Comment 2 Denis Shulyaka 2017-08-03 19:39:19 UTC

Hi Tanu,

Thank you for the response.
Yes, that fixes the problem.

Best regards,
Denis Shulyaka

Comment 3 Tanu Kaskinen 2017-08-04 08:23:19 UTC

Thanks for testing! I sent a patch to the mailing list now:
https://patchwork.freedesktop.org/patch/170317/

Comment 4 Tanu Kaskinen 2017-08-04 10:51:27 UTC

I pushed the patch to the "next" branch now. Closing bug.

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