I just tried out the latest version of the Trusty kernel (3.13.0-88-generic #135-Ubuntu), and I confirm that the bug seems to be fixed (i.e., USB is fully working, and tvtime runs without shutting down the USB host).
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1200204 Title: 2040:7200 SuperSpeed USB failure (and kernel oops) after launching tvtime: ERROR Transfer event TRB DMA ptr not part of current TD; unable to handle kernel NULL pointer dereference at 0000000000000018; IP is at usb_set_interface+0x19/0x2d0 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1200204/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs