kernel-packages team mailing list archive

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

Benjamin McGough, thank you for your comment. So your hardware and problem may be tracked, could you please file a new report with Ubuntu by executing the following in a terminal while booted into a Ubuntu repository kernel (not a mainline one) via:
ubuntu-bug linux

For more on this, please read the official Ubuntu documentation:
Ubuntu Bug Control and Ubuntu Bug Squad: https://wiki.ubuntu.com/Bugs/BestPractices#X.2BAC8-Reporting.Focus_on_One_Issue
Ubuntu Kernel Team: https://wiki.ubuntu.com/KernelTeam/KernelTeamBugPolicies#Filing_Kernel_Bug_reports
Ubuntu Community: https://help.ubuntu.com/community/ReportingBugs#Bug_reporting_etiquette

When opening up the new report, please feel free to subscribe me to it.

Thank you for your understanding.

Helpful bug reporting tips:
https://wiki.ubuntu.com/ReportingBugs

** Tags removed: kernel-bug-exists-upstream kernel-bug-exists-
upstream-3.12.0

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https://bugs.launchpad.net/bugs/889953

Title:
  bandwidth allocation problems with external USB audio device

Status in “linux” package in Ubuntu:
  Incomplete
Status in “linux” package in Fedora:
  Unknown

Bug description:
  usb-audio with a Zoom H4N does not work.

  The Zoom H4N contains a USB hub and a usb-audio device. When connecting, it produces the following error in dmesg:
  cannot submit datapipe for urb 0, error -28: not enough bandwidth
  When attempting to use Jack in full-duplex, jackd attempts a 0x4142 ioctl (SNDRV_PCM_IOCTL_START), gets an EPIPE, and crashes; the kernel produces another 'cannot submit datapipe for urb 0, error -28: not enough bandwidth' message in dmesg.

  From reading various forums and lists, the problem seems related to a
  bug in bandwidth allocation in EHCI_HCD with respect to isochronous
  endpoints (audio devices), which happens particularly badly when these
  devices are behind hubs.

  Workaround: disable the EHCI controller to which the audio device is connected, e.g.
  echo -n '0000:00:1d.7' > /sys/bus/pci/drivers/ehci_hcd/unbind
  where 0000:00:1d.7 is to be replaced by the correct PCI address. This will reconnect the device under USB 1.1.

  This problem has been going on for years in the Linux kernel and
  should definitely be fixed.

  ProblemType: Bug
  DistroRelease: Ubuntu 11.10
  Package: linux-image-3.0.0-12-generic 3.0.0-12.20
  ProcVersionSignature: Ubuntu 3.0.0-12.20-generic 3.0.4
  Uname: Linux 3.0.0-12-generic i686
  NonfreeKernelModules: wl
  AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.24.
  ApportVersion: 1.23-0ubuntu4
  Architecture: i386
  ArecordDevices:
   **** List of CAPTURE Hardware Devices ****
   card 0: Intel [HDA Intel], device 0: STAC92xx Analog [STAC92xx Analog]
     Subdevices: 1/1
     Subdevice #0: subdevice #0
  AudioDevicesInUse:
   USER        PID ACCESS COMMAND
   /dev/snd/controlC0:  david      2167 F.... pulseaudio
  CRDA: Error: command ['iw', 'reg', 'get'] failed with exit code 1: nl80211 not found.
  Card0.Amixer.info:
   Card hw:0 'Intel'/'HDA Intel at 0xf6adc000 irq 46'
     Mixer name	: 'Intel Cantiga HDMI'
     Components	: 'HDA:111d76b2,10280277,00100302 HDA:80862802,80860101,00100000'
     Controls      : 19
     Simple ctrls  : 11
  Date: Sun Nov 13 21:09:45 2011
  EcryptfsInUse: Yes
  HibernationDevice: RESUME=UUID=ef890c0a-abf2-48af-b767-6c84d2fdf528
  InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release i386 (20100429)
  MachineType: Dell Inc. Latitude E4200
  ProcEnviron:
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.0.0-12-generic root=UUID=238c0805-e3d7-41bb-bcc2-ee866f5734f3 ro quiet splash vt.handoff=7
  RelatedPackageVersions:
   linux-restricted-modules-3.0.0-12-generic N/A
   linux-backports-modules-3.0.0-12-generic  N/A
   linux-firmware                            1.60
  SourcePackage: linux
  UpgradeStatus: Upgraded to oneiric on 2011-10-15 (29 days ago)
  dmi.bios.date: 05/06/2010
  dmi.bios.vendor: Dell Inc.
  dmi.bios.version: A16
  dmi.board.name: 02GMRH
  dmi.board.vendor: Dell Inc.
  dmi.chassis.type: 8
  dmi.chassis.vendor: Dell Inc.
  dmi.modalias: dmi:bvnDellInc.:bvrA16:bd05/06/2010:svnDellInc.:pnLatitudeE4200:pvr:rvnDellInc.:rn02GMRH:rvr:cvnDellInc.:ct8:cvr:
  dmi.product.name: Latitude E4200
  dmi.sys.vendor: Dell Inc.

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