Public bug reported:
I have an external sound card--A Topping VX2. When plugged in to USB,
the device seems to keep Ubuntu from booting properly. It hangs until I
remove the USB cord from the device, then Ubuntu boots normally.
Once booted, the device can be recognized by Ubuntu, but then seems to
nuke PulseAudio, leaving no devices in the Sound Settings.
Yes, I have checked this behavior against two Topping VX2 devices, which have
identical results.
Yes, I have switched out USB cords to test for a bad cord.
The VX2 uses Via Technologies VT 1620A USB audio controller. I suspect
that this may be the issue. Is this currently supported? Is there a
working driver for this?
THanks.
ProblemType: Bug
DistroRelease: Ubuntu 15.10
Package: pulseaudio 1:6.0-0ubuntu13
ProcVersionSignature: Ubuntu 4.2.0-34.39-generic 4.2.8-ckt4
Uname: Linux 4.2.0-34-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.19.1-0ubuntu5
Architecture: amd64
CurrentDesktop: Unity
Date: Mon Mar 21 15:27:54 2016
InstallationDate: Installed on 2016-03-15 (6 days ago)
InstallationMedia: Ubuntu 15.10 "Wily Werewolf" - Release amd64 (20151021)
ProcEnviron:
LANGUAGE=en_US
PATH=(custom, no user)
XDG_RUNTIME_DIR=<set>
LANG=en_US.UTF-8
SHELL=/bin/bash
PulseList: Error: command ['pacmd', 'list'] failed with exit code 1: Daemon not
responding.
SourcePackage: pulseaudio
Symptom: audio
Symptom_Card: USB-Audio - C-Media USB Audio Device
Title: [USB-Audio - VX2, playback] Pulseaudio fails to detect card
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 11/26/2015
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 2101
dmi.board.asset.tag: To be filled by O.E.M.
dmi.board.name: X99-A
dmi.board.vendor: ASUSTeK COMPUTER INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 3
dmi.chassis.vendor: To Be Filled By O.E.M.
dmi.chassis.version: To Be Filled By O.E.M.
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr2101:bd11/26/2015:svnASUS:pnAllSeries:pvrSystemVersion:rvnASUSTeKCOMPUTERINC.:rnX99-A:rvrRev1.xx:cvnToBeFilledByO.E.M.:ct3:cvrToBeFilledByO.E.M.:
dmi.product.name: All Series
dmi.product.version: System Version
dmi.sys.vendor: ASUS
** Affects: pulseaudio (Ubuntu)
Importance: Undecided
Status: New
** Tags: amd64 apport-bug wily
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https://bugs.launchpad.net/bugs/1560181
Title:
[USB-Audio - VX2, playback] Pulseaudio fails to detect card
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