The kernel 4.8 also prevents UEFI Startup Manager from booting external usb devices such as fobs or hard drives.
Possibly booting to Startuop Manager and then from thunderbolt or pxe still works -- 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_kcd 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
