kernel-packages team mailing list archive

["Christopher M. Penalver" <christopher.m.penalver@xxxxxxxxx>]

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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