Public bug reported:
Hi @all,
I used the same USB audio device in all previous Ubuntu versions
(Focusrite Scarlet 2i2). It is supposed to be class compliant and works
an all distros flawless (even RPI2 and OSMC). After upgrading from 15.10
to 16.04 it stopped to work: after start-up it does not show up as an
audio device at all (also not recognized by aplay -l). I can workaround
this by unplugging it and plugging it in again after Ubuntu booted up
(strangely 2 times unplug/re-plug). After 2nd time plugging it in again
it shows up and works great without any further issues until next
restart.
Maybe worth to note that I recognized today that fwupd uses continuously
100% CPU load, so I just killed it today. My Hardware (Main-board/CPU)
is a bit older (Intel E8400), so could probably be some compatibility
issue...
regards,
Tobias
ProblemType: Bug
DistroRelease: Ubuntu 16.04
Package: alsa-base 1.0.25+dfsg-0ubuntu5
ProcVersionSignature: Ubuntu 4.4.0-21.37-generic 4.4.6
Uname: Linux 4.4.0-21-generic i686
NonfreeKernelModules: nvidia_modeset nvidia
ApportVersion: 2.20.1-0ubuntu2
Architecture: i386
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/pcmC1D0p: tobias 1553 F...m pulseaudio
/dev/snd/controlC1: tobias 1553 F.... pulseaudio
/dev/snd/controlC0: tobias 1553 F.... pulseaudio
/dev/snd/controlC2: tobias 1553 F.... pulseaudio
CurrentDesktop: Unity
Date: Sat Apr 23 20:09:04 2016
InstallationDate: Installed on 2015-09-19 (217 days ago)
InstallationMedia: Ubuntu 15.04 "Vivid Vervet" - Release i386 (20150422)
PackageArchitecture: all
SourcePackage: alsa-driver
UpgradeStatus: Upgraded to xenial on 2016-04-22 (0 days ago)
dmi.bios.date: 09/30/2008
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1238
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: P5B-Deluxe
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.asset.tag: Asset-1234567890
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.modalias:
dmi:bvnAmericanMegatrendsInc.:bvr1238:bd09/30/2008:svnSystemmanufacturer:pnSystemProductName:pvrSystemVersion:rvnASUSTeKComputerINC.:rnP5B-Deluxe:rvrRev1.xx:cvnChassisManufacture:ct3:cvrChassisVersion:
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
** Affects: alsa-driver (Ubuntu)
Importance: Undecided
Status: New
** Tags: apport-bug i386 xenial
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https://bugs.launchpad.net/bugs/1574079
Title:
USB audio device is not recognized after startup in 16.04
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