Asus Xonar U7 S/PDIF output not recognized by pulseaudio

[aoandr]

duplicate of Bug #1498129

I was not able to make ubuntu-bug to upload the information to the original bug, sorry. It would not allow me to select alsa-driver package, because "it is not installed".

I applied the patch suggested by Raymond:
https://git.kernel.org/cgit/linux/kernel/git/tiwai/sound.git/commit/sound/usb?id=a358a0ef861dae6f8330fb034aaa43adae71ebc1

Got rid of "cannot get ctl value:" error. Now alsamixer starts without ignore_ctl_error=1 option for snd-usb-audio module.

Thank you, Raymond!

Still no luck with Pulseaudio: it does not recognize S/PDIF interface. Even more: it shows "S/PDIF" interface, which is actually an alias to the Analog Stereo output.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: pulseaudio 1:4.0-0ubuntu11.1
ProcVersionSignature: Ubuntu 3.13.0-63.103-lowlatency 3.13.11-ckt25
Uname: Linux 3.13.0-63-lowlatency i686
ApportVersion: 2.14.1-0ubuntu3.13
Architecture: i386
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC0: aoand 4448 F.... pulseaudio
 /dev/snd/controlC1: aoand 4448 F.... pulseaudio
CurrentDesktop: Unity
Date: Wed Sep 23 01:01:27 2015
EcryptfsInUse: Yes
InstallationDate: Installed on 2011-02-20 (1675 days ago)
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release i386 (20101007.1)
SourcePackage: pulseaudio
UpgradeStatus: Upgraded to trusty on 2014-05-19 (491 days ago)
dmi.bios.date: 11/29/2012
dmi.bios.vendor: LENOVO
dmi.bios.version: 7WET71WW (3.21 )
dmi.board.name: 7448CTO
dmi.board.vendor: LENOVO
dmi.board.version: Not Available
dmi.chassis.asset.tag: No Asset Information
dmi.chassis.type: 10
dmi.chassis.vendor: LENOVO
dmi.chassis.version: Not Available
dmi.modalias: dmi:bvnLENOVO:bvr7WET71WW(3.21):bd11/29/2012:svnLENOVO:pn7448CTO:pvrThinkPadX200Tablet:rvnLENOVO:rn7448CTO:rvrNotAvailable:cvnLENOVO:ct10:cvrNotAvailable:
dmi.product.name: 7448CTO
dmi.product.version: ThinkPad X200 Tablet
dmi.sys.vendor: LENOVO
modified.conffile..etc.pulse.default.pa: [modified]
mtime.conffile..etc.pulse.default.pa: 2015-09-23T00:33:57.990672