Apparently there's a firmware update (I was running 1.10, which is about a month old - I've updated the firmware several times during the life time of this bug). I'll update and wait for it to happen again.
BTW - the behavior is usually that after this disconnect happens once, I can reset the USB controller (using sysfs API to unbind and re-bind xhci_hcd), but then it will get the problem again and again, several times an hour (its not very predictable, sometimes I get 2 in a row and sometimes half an hour can pass before it breaks again). I thought this can be temperature related, so I pushed the computer to low power mode after the first event of the day, and reset the bus, but it happened again. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1766076 Title: USB over thunderbolt turns off every once in a while To manage notifications about this bug go to: https://bugs.launchpad.net/dell-sputnik/+bug/1766076/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
