I have an Intel NUC D54250WYK running BIOS V32, Ubuntu 14.04 and Unity with a very similar issue. If I boot with the 290e tuner attached and then turn on an external DAC, the Cambridge Audio DacMagic 100, all the USB ports fail. Logs show the same xHCI host crash.
I found two ways to deal with the problem. 1. Uninstall the MythTV backend - undesirable 2. Remove the 290e usb tuner during booting. Putting it in after a minute after booting means both DAC and 290e coexist, but they used to without this complication at the beginning of the year using, still on the same NUC on Trusty. Still looks like a kernel bug. -- 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/1313279 Title: xHCI host not responding to stop endpoint command Status in The Linux Kernel: Unknown Status in linux package in Ubuntu: Confirmed Bug description: Description: Ubuntu 14.04 LTS Release: 14.04 Hardware: Intel NUC D34010WYK (Core i3 4010U) Memory: 4 gigabytes USD device: PCTV 292e DVB-T tuner I have 2 PCTV 292e DVB-T tuners connected to the system. When I start to use either of the tuner, the xHCI host crashes. Since I'm booting from an USB disk. If I only connect 1 of the tuners, the system works ok. It does not matter which one of the tuners I connect. [ 68.990396] xhci_hcd 0000:00:14.0: xHCI host not responding to stop endpoint command. [ 68.990402] xhci_hcd 0000:00:14.0: Assuming host is dying, halting host. Sometimes this also leads to this: [ 638.183002] IP: [<ffffffff815325dd>] usb_enable_link_state+0x2d/0x2f0 [ 638.183057] PGD 0 [ 638.183077] Oops: 0000 [#1] SMP I can also observe the same fault with OpenELEC Linux distribution that runs kernel 3.14 when I run the system from an internal SATA SSD drive (not from an external USB disk). lsusb -v: http://paste.ubuntu.com/7343384/ dmesg: http://sprunge.us/HMXH dmesg (crash type 2): http://sprunge.us/PSiX ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: lubuntu-desktop 0.55 ProcVersionSignature: Ubuntu 3.13.0-24.46-generic 3.13.9 Uname: Linux 3.13.0-24-generic x86_64 ApportVersion: 2.14.1-0ubuntu3 Architecture: amd64 Date: Sun Apr 27 11:12:22 2014 InstallationDate: Installed on 2014-04-07 (19 days ago) InstallationMedia: Lubuntu 13.10 "Saucy Salamander" - Release amd64 (20131016.1) SourcePackage: lubuntu-meta UpgradeStatus: Upgraded to trusty on 2014-04-26 (0 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1313279/+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