0) D: [pulseaudio] alsa-util.c: Trying front:1 with SND_PCM_NO_AUTO_FORMAT ...
(   0.385|   0.000) D: [pulseaudio] alsa-util.c: Managed to open front:1
(   0.385|   0.000) D: [pulseaudio] alsa-util.c: Maximum hw buffer size is 371 
ms
(   0.385|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.385|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.385|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.385|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.385|   0.000) D: [pulseaudio] alsa-util.c: Set neither period nor buffer 
size.
(   0.385|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.385|   0.000) I: [pulseaudio] alsa-util.c: snd_pcm_hw_params failed: 
Device or resource busy
(   0.385|   0.000) D: [pulseaudio] alsa-util.c: Trying front:1 without 
SND_PCM_NO_AUTO_FORMAT ...
(   0.386|   0.000) D: [pulseaudio] alsa-util.c: Managed to open front:1
(   0.386|   0.000) D: [pulseaudio] alsa-util.c: Maximum hw buffer size is 371 
ms
(   0.386|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.386|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.386|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.386|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.386|   0.000) D: [pulseaudio] alsa-util.c: Set neither period nor buffer 
size.
(   0.386|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.386|   0.000) I: [pulseaudio] alsa-util.c: snd_pcm_hw_params failed: 
Device or resource busy
(   0.386|   0.000) D: [pulseaudio] alsa-util.c: Trying plug:front:1 with 
SND_PCM_NO_AUTO_FORMAT ...
(   0.387|   0.000) D: [pulseaudio] alsa-util.c: Managed to open plug:front:1
(   0.387|   0.000) D: [pulseaudio] alsa-util.c: Maximum hw buffer size is 371 
ms
(   0.388|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.388|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.388|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.388|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.388|   0.000) D: [pulseaudio] alsa-util.c: Set neither period nor buffer 
size.
(   0.388|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.388|   0.000) I: [pulseaudio] alsa-util.c: snd_pcm_hw_params failed: 
Device or resource busy
(   0.388|   0.000) D: [pulseaudio] alsa-util.c: Trying plug:front:1 without 
SND_PCM_NO_AUTO_FORMAT ...
(   0.389|   0.000) D: [pulseaudio] alsa-util.c: Managed to open plug:front:1
(   0.390|   0.000) D: [pulseaudio] alsa-util.c: Maximum hw buffer size is 371 
ms
(   0.390|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.390|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.390|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.390|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.390|   0.000) D: [pulseaudio] alsa-util.c: Set neither period nor buffer 
size.
(   0.390|   0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
(   0.390|   0.000) I: [pulseaudio] alsa-util.c: snd_pcm_hw_params failed: 
Device or resource busy
(   0.390|   0.000) I: [pulseaudio] alsa-util.c: Failed to set hardware 
parameters on plug:front:1: Device or resource busy
(   0.390|   0.000) D: [pulseaudio] alsa-util.c: Trying hw:1 with 
SND_PCM_NO_AUTO_FORMAT ...
(   0.391|   0.000) D: [pulseaudio] alsa-util.c: Managed to open hw:1
(   0.391|   0.000) D: [pulseaudio] alsa-util.c: Maximum hw buffer size is 371 
ms
(   0.391|   0.000) D: [pulseaudio] alsa-util.c: Set buffer size first (to 3528 
samples), period size second (to 441 samples).
(   0.391|   0.000) D: [pulseaudio] alsa-mixer.c: Profile 
output:analog-stereo+input:analog-stereo supported.


you need to use asym plugin so that open capture device won't lock the controls 
for front,..., iec958,...


-       type hooks
-       slave.pcm {
+       type asym
+       playback.pcm {
+               type hooks
+               slave.pcm {
+                       type hw
+                       card $CARD
+               }
+               hooks.0 {
+                       type ctl_elems
+                       hook_args [

........

+               }
+       }
+       capture.pcm {
                type hw
                card $CARD
        }

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https://bugs.launchpad.net/bugs/1329014

Title:
  [Audigy2 - SB Audigy 2 [SB0240], playback] No sound at all

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