I did find an upstream bug report from earlier this year: https://bugzilla.kernel.org/show_bug.cgi?id=65021
... although haven't had a chance to progress it as getting my system working was more of an imperative. Might be worth everyone piling on the back of that one, or opening a new report and linking it back? ** Bug watch added: Linux Kernel Bug Tracker #65021 http://bugzilla.kernel.org/show_bug.cgi?id=65021 -- 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/ubuntu/+source/lubuntu-meta/+bug/1313279/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs