Hi I raised https://bugzilla.kernel.org/show_bug.cgi?id=198557 but was informed by Greg bugs should be raised on the mailing list not in bugzilla So USB-C devices only show up in dmesg or for use if they are connected during boot Once booted and the device is disconnected the following message appears in the dmesg: [ 100.814687] usb 3-1: USB disconnect, device number 3 [ 100.882840] xhci_hcd 0000:39:00.0: xHCI host controller not responding, assume dead [ 100.882843] xhci_hcd 0000:39:00.0: HC died; cleaning up No further connections or disconnections display anything further in the dmesg, the device works fine if connected via USB-A I've witnessed this behaviour since getting the laptop at the end of 2015 so this isn't a regression The full dmesg can be seen here https://bugzilla.kernel.org/attachment.cgi?id=273801 Thanks for any help you can offer Mike -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html