http://git.alsa-project.org/?p=alsa-
lib.git;a=blob;f=src/conf/cards/CA0106.conf;hb=HEAD
there are locks associated with playback controls of iec958 device
but pulseaudio try to open iec958 capture device
.000) D: [pulseaudio] alsa-util.c: Managed to open iec958:0
( 0.352| 0.000) D: [pulseaudio] alsa-util.c: Maximum hw buffer size is 340
ms
( 0.352| 0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
( 0.352| 0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
( 0.352| 0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
( 0.352| 0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
( 0.352| 0.000) D: [pulseaudio] alsa-util.c: Set neither period nor buffer
size.
( 0.352| 0.000) I: [pulseaudio] (alsa-lib)setup.c: Cannot lock ctl elem
( 0.352| 0.000) I: [pulseaudio] alsa-util.c: snd_pcm_hw_params failed:
Device or resource busy
hooks.0 {
type ctl_elems
hook_args [
{
name "IEC958 Front Playback Volume"
index 0
lock true
preserve true
value [ 207 207 ] # Puts 0x30303030 in the
Volume register. 0xff - 0x30 = 0xcf = 207
}
{
name "IEC958 Playback Switch"
lock true
preserve true
value 1
}
{
interface PCM
name "IEC958 Playback Default"
index 1
lock true
preserve true
optional true
value [ $AES0 $AES1 $AES2 $AES3 ]
}
{
# for compatibility with older drivers
name "IEC958 Playback Default"
index 1
lock true
preserve true
optional true
value [ $AES0 $AES1 $AES2 $AES3 ]
}
]
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https://bugs.launchpad.net/bugs/1497666
Title:
No right channel sound on Creative Xtreme Audio (CA0106) in Ubuntu
14.04-15.10
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https://bugs.launchpad.net/ubuntu/+source/alsa-driver/+bug/1497666/+subscriptions
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