USB sound card stopped working (not detected)

[Remco]

My USB headset stopped working. This may have been after an update. Dmesg shows that the device is recognized, but then there is the following error:

snd_usb_audio: Unknown parameter `index'

ProblemType: Bug
DistroRelease: Ubuntu 13.10
Package: alsa-base 1.0.25+dfsg-0ubuntu4
ProcVersionSignature: Ubuntu 3.10.0-4.13-generic 3.10.1
Uname: Linux 3.10.0-4-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.11-0ubuntu1
Architecture: amd64
AudioDevicesInUse:
 USER PID ACCESS COMMAND
 /dev/snd/controlC1: remco 2028 F.... pulseaudio
 /dev/snd/controlC0: remco 2028 F.... pulseaudio
Date: Sun Jul 21 00:19:11 2013
MarkForUpload: True
PackageArchitecture: all
SourcePackage: alsa-driver
Symptom: audio
Title: USB sound card not detected
UpgradeStatus: Upgraded to saucy on 2013-06-17 (33 days ago)
dmi.bios.date: 09/28/2009
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: V2.3
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: 785GM-E51 (MS-7596)
dmi.board.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
dmi.board.version: 1.0
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: MICRO-STAR INTERNATIONAL CO.,LTD
dmi.chassis.version: 1.0
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvrV2.3:bd09/28/2009:svnMICRO-STARINTERNATIONALCO.,LTD:pnMS-7596:pvr1.0:rvnMICRO-STARINTERNATIONALCO.,LTD:rn785GM-E51(MS-7596):rvr1.0:cvnMICRO-STARINTERNATIONALCO.,LTD:ct3:cvr1.0:
dmi.product.name: MS-7596
dmi.product.version: 1.0
dmi.sys.vendor: MICRO-STAR INTERNATIONAL CO.,LTD

[Daniel Letzeisen (dtl131)]

I couldn't get the snd-usb-audio module to load either (same error).

[Daniel Letzeisen (dtl131)]

I was able to workaround the issue by commenting out the two 'snd_usb_audio: index=-2' lines in /etc/modprobe.d/alsa-base.conf

[Julian Alarcon (julian-alarcon)]

Thanks Daniel, your workaround worked flawlessly. Just commented that 2 lines (BTW, why is this line twice on that file?)