[Bug 1574079] Re: USB audio device is not recognized after startup in 16.04
superm1 at ubuntu.com
Sun May 29 13:51:13 UTC 2016
** No longer affects: alsa-driver (Ubuntu)
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USB audio device is not recognized after startup in 16.04
Status in fwupd package in Ubuntu:
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...
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
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
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)
UpgradeStatus: Upgraded to xenial on 2016-04-22 (0 days ago)
dmi.bios.vendor: American Megatrends Inc.
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.version: Chassis Version
dmi.product.name: System Product Name
dmi.product.version: System Version
dmi.sys.vendor: System manufacturer
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