This seems to be the correlated upstream kernel bug: https://bugzilla.kernel.org/show_bug.cgi?id=115741
** Bug watch added: Linux Kernel Bug Tracker #115741 http://bugzilla.kernel.org/show_bug.cgi?id=115741 -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1668105 Title: xhci_hcd module turns off usb host controller on boot To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1668105/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
