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 Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1313279 Title: xHCI host not responding to stop endpoint command To manage notifications about this bug go to: https://bugs.launchpad.net/linux/+bug/1313279/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs