A kernel patch has been accepted that mostly resolves this issue: http://www.gossamer-threads.com/lists/linux/kernel/2126922
This modifies the xHCI driver to apply a quirk (XHCI_AVOID_BEI) to all Intel xHCI host controllers (previously the quirk was only applied to one series of Intel controllers). The patch affects all isochronous USB devices, e.g. video and audio capture. After applying the patch I'm able to record video as long as the Live2 is plugged in after the PC has booted. If the Live2 is present during boot, the failure is intermittent. Our latest hypothesis is that this is a bug in the cx231xx driver, not the xHCI driver. The current behaviour is still a big step forward, allowing reliable recording, and likely will resolve issues for a significant number of video and audio capture devices connected to Intel xHCI host controllers, thus for now I would mark this issue resolved and I'll submit another bug report if I'm able to narrow down the outstanding issue(s). I've successfully tested the patch against the following kernels: * Mainline 4.0-rc5 * Mainline 3.19.2 * Mainline 3.19.3 * Ubuntu 3.19.0-10-generic It looks like it will be kernel 4.1 before the patch makes it to general availability. Should I change the status from "Triaged" to "Fix Committed"? Thanks, Alistair -- 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/1412121 Title: Hauppauge USB-Live2 fails on Haswell USB3 port Status in linux package in Ubuntu: Triaged Bug description: Hi, I've been attempting to capture video using a Hauppauge USB-Live2. This works fine in Ubuntu 14.04 on an older laptop that only has USB2 ports, but fails on my Dell XPS13 which is USB3 with the Haswell chipset. The information in this bug report is based on Ubuntu 14.10 / Kernel 3.16.0-29, however I have also tried it on a daily 15.04 image (3.18 kernel) and using the upstream 3.19-rc4 kernel without success (the error messages change, and it does seem to be improving, but still fails to operate correctly). I'll attach an extract from /var/log/syslog that shows the following: 1. Plugging in the Live2 - from 09:30:48 to 09:30:56 2. Attempting to run mythffmpeg as shown below - at 09:31:33 3. Terminating mythffmpeg with Control-C - 09:31:43 4. Unplugging the Live2 - 09:32:47 The command line was: mythffmpeg -y -loglevel debug -f alsa -i plughw:1,0 -f v4l2 -s pal -pix_fmt yuyv422 -i /dev/video1 -b:v 2048k a.nut Please let me know what other information you would like to see. Thanks, Alistair ProblemType: Bug DistroRelease: Ubuntu 14.10 Package: linux-image-3.16.0-29-generic 3.16.0-29.39 ProcVersionSignature: Ubuntu 3.16.0-29.39-generic 3.16.7-ckt2 Uname: Linux 3.16.0-29-generic x86_64 ApportVersion: 2.14.7-0ubuntu8 Architecture: amd64 AudioDevicesInUse: USER PID ACCESS COMMAND /dev/snd/controlC1: alistair 3318 F.... pulseaudio /dev/snd/controlC0: alistair 3318 F.... pulseaudio CurrentDesktop: Unity Date: Sun Jan 18 09:34:55 2015 EcryptfsInUse: Yes HibernationDevice: RESUME=UUID=702aea9f-a502-441c-b933-e9c6a284ce3a InstallationDate: Installed on 2013-12-25 (389 days ago) InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20131224) MachineType: Dell Inc. XPS13 9333 ProcFB: 0 inteldrmfb ProcKernelCmdLine: BOOT_IMAGE=/boot/vmlinuz-3.16.0-29-generic root=UUID=d63939df-e79f-4ea5-a068-c9bf2a928200 ro persistent quiet splash vt.handoff=7 RelatedPackageVersions: linux-restricted-modules-3.16.0-29-generic N/A linux-backports-modules-3.16.0-29-generic N/A linux-firmware 1.138.1 SourcePackage: linux UpgradeStatus: Upgraded to utopic on 2014-12-10 (38 days ago) dmi.bios.date: 11/11/2013 dmi.bios.vendor: Dell Inc. dmi.bios.version: A01 dmi.board.name: 099TN4 dmi.board.vendor: Dell Inc. dmi.board.version: A00 dmi.chassis.type: 8 dmi.chassis.vendor: Dell Inc. dmi.chassis.version: 0.1 dmi.modalias: dmi:bvnDellInc.:bvrA01:bd11/11/2013:svnDellInc.:pnXPS139333:pvr:rvnDellInc.:rn099TN4:rvrA00:cvnDellInc.:ct8:cvr0.1: dmi.product.name: XPS13 9333 dmi.sys.vendor: Dell Inc. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1412121/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
