David Monniaux, this bug was reported a while ago and there hasn't been any activity in it recently. We were wondering if this is still an issue? If so, could you please test for this with the latest development release of Ubuntu? ISO images are available from http://cdimage.ubuntu.com/daily-live/current/ .
If it remains an issue, could you please run the following command in the development release from a Terminal (Applications->Accessories->Terminal), as it will automatically gather and attach updated debug information to this report: apport-collect -p linux <replace-with-bug-number> If reproducible, could you also please test the latest upstream kernel available (not the daily folder) following https://wiki.ubuntu.com/KernelMainlineBuilds ? It will allow additional upstream developers to examine 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. For example: kernel-fixed-upstream-v3.13-rc5 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. As well, please remove the tag: needs-upstream-testing If the mainline kernel does not fix this bug, please add the following tags: kernel-bug-exists-upstream kernel-bug-exists-upstream-VERSION-NUMBER As well, please remove the tag: needs-upstream-testing 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 ** Tags added: bios-outdated-a24 needs-upstream-testing ** Changed in: linux (Ubuntu) Status: Triaged => Incomplete -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. 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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