As per Mathias's email, setting xhci_hcd.quirks=0x0004b810 solves this problem. See message here: http://www.spinics.net/lists/linux- usb/msg146618.html
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1606030 Title: System reboots instead of shutting down if xhci is enabled in BIOS and USB hub is connected To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1606030/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
