Thomas Meyssonnier, thank you for reporting this and helping make Ubuntu
better. Could you please test the latest upstream kernel available from
the very top line at the top of the page (the release names are
irrelevant for testing, and please do not test the daily folder)
following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow
additional upstream developers to examine the issue.
If the test did not allow you to test to the issue (ex. you couldn't boot into
the OS) please make a comment in your report about this, and continue to test
the next most recent kernel version until you can test to the issue. Once
you've tested the upstream kernel, please comment on which kernel version
specifically you tested. If this bug is fixed in the mainline kernel, please
add the following tags:
kernel-fixed-upstream
kernel-fixed-upstream-VERSION-NUMBER
where VERSION-NUMBER is the version number of the kernel you tested exactly
shown as:
kernel-fixed-upstream-3.18
This can be done by clicking on the yellow circle with a black pencil
icon next to the word Tags located at the bottom of the bug description.
If the mainline kernel does not fix this bug, please add the following tags:
kernel-bug-exists-upstream
kernel-bug-exists-upstream-VERSION-NUMBER
Once testing of the upstream kernel is complete, please mark this bug's
Status as Confirmed. Please let us know your results. Thank you for your
understanding.
** Tags added: latest-bios-1.21
** Changed in: linux (Ubuntu)
Importance: Undecided => Medium
** Changed in: linux (Ubuntu)
Status: Confirmed => Incomplete
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https://bugs.launchpad.net/bugs/1402196
Title:
Behringer UMC404 USB2 audio interface disconnects when initialized
Status in linux package in Ubuntu:
Incomplete
Bug description:
My audio interface, a Behriger UMC404, disappears from both lsusb and
/proc/asound/cards as soon as I start jackd (JACK 2). This results in
jackd failing because the card is missing. It reports a "protocol
error" which I think refers to the USB link. See attached syslog
messages. The card does not show up at all in Pulseaudio. Also, this
card works just fine on my desktop, the bug only occurs on my laptop.
Thanks,
TM
ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: linux-lowlatency 3.13.0.43.50
ProcVersionSignature: Ubuntu 3.13.0-43.72-lowlatency 3.13.11.11
Uname: Linux 3.13.0-43-lowlatency x86_64
ApportVersion: 2.14.1-0ubuntu3.6
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/controlC1: tmeysson 3178 F.... pulseaudio
/dev/snd/controlC0: tmeysson 3178 F.... pulseaudio
CurrentDesktop: XFCE
Date: Sat Dec 13 14:39:46 2014
HibernationDevice: RESUME=UUID=be114ffc-be9c-47e3-b2b6-7f49c90f9931
InstallationDate: Installed on 2014-12-03 (10 days ago)
InstallationMedia: Ubuntu-Studio 14.04.1 LTS "Trusty Tahr" - Release amd64
(20140722.1)
MachineType: Hewlett-Packard HP EliteBook 840 G1
ProcFB: 0 inteldrmfb
ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.13.0-43-lowlatency
root=UUID=20e973d8-558f-476d-9979-54c79133177e ro quiet splash vt.handoff=7
RelatedPackageVersions:
linux-restricted-modules-3.13.0-43-lowlatency N/A
linux-backports-modules-3.13.0-43-lowlatency N/A
linux-firmware 1.127.10
SourcePackage: linux
UpgradeStatus: No upgrade log present (probably fresh install)
dmi.bios.date: 09/03/2014
dmi.bios.vendor: Hewlett-Packard
dmi.bios.version: L71 Ver. 01.21
dmi.board.name: 198F
dmi.board.vendor: Hewlett-Packard
dmi.board.version: KBC Version 15.55
dmi.chassis.asset.tag: 5CG446445Q
dmi.chassis.type: 10
dmi.chassis.vendor: Hewlett-Packard
dmi.modalias:
dmi:bvnHewlett-Packard:bvrL71Ver.01.21:bd09/03/2014:svnHewlett-Packard:pnHPEliteBook840G1:pvrA3008CD10003:rvnHewlett-Packard:rn198F:rvrKBCVersion15.55:cvnHewlett-Packard:ct10:cvr:
dmi.product.name: HP EliteBook 840 G1
dmi.product.version: A3008CD10003
dmi.sys.vendor: Hewlett-Packard
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