We want to run a script whenever the laptop is docked or undocked. The
idea is to add a udev role to run a given script. The main nuisance
is that each dock reports a different USB ID, so we need to add one
for each of the models. On gentoo, udev rules need to be added to
/etc/udev/rules.d/
We create a file named /etc/udev/rules.d/81-thinkpad-dock.rules and
permissions 644 with the following content:
# Save this file (after modifying ID_VENDOR and ID_MODEL if necessary) as /etc/udev/rules.d/81-thinkpad-dock.rules
# Ultra dock 1
SUBSYSTEM=="usb", ACTION=="add|remove", ENV{PRODUCT}=="17ef/1010/5041", RUN+="/sbin/thinkpad-dock.sh"
# Ultra dock 2
SUBSYSTEM=="usb", ACTION=="add|remove", ENV{PRODUCT}=="17ef/1010/5031", RUN+="/sbin/thinkpad-dock.sh"
# Basic dock
SUBSYSTEM=="usb", ACTION=="add|remove", ENV{PRODUCT}=="17ef/1013/5031", RUN+="/sbin/thinkpad-dock.sh"
# Pro dock
SUBSYSTEM=="usb", ACTION=="add|remove", ENV{PRODUCT}=="17ef/1012/5040", RUN+="/sbin/thinkpad-dock.sh"
The correct PRODUCT string can be found by running
udevadm monitor --subsystem-match=usb --property --udev
Once the file is in place, udev rules can be reloaded with:
udevadm control --reload-rules