Run /lib/systemd/systemd-udevd -D -should print garbage in endless loop
containing ".../97-hid2hci.rules:"
If so, edit /lib/udev/rules.d/97-hid2hci.rules and add ACTION=="add", in
front of line mentioned by above command.
It should be something like this (I'm using fedora 28, but the problem
looked identical): ACTION=="add", ATTR{bInterfaceClass}=="03",
ATTR{bInterfaceSubClass}=="01", ATTR{bInterfaceProtocol}=="02", \
ATTRS{bDeviceClass}=="00", ATTRS{idVendor}=="413c",
ATTRS{bmAttributes}=="e0", \ RUN+="hid2hci --method=dell --devpath=%p",
ENV{HID2HCI_SWITCH}="1"
Source:- https://askubuntu.com/a/1059845
