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I'd like to run custom scripts on docking or un-docking my ThinkPad X220.

Obvious place is some udev rule, but what events or attributes should I use? Another option is acpi. Is it better option? What else comes as viable alternative? I am running Debian, a mix between squeeze, backports, wheeze... and sid. Is there any native solution?

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I have no way to test this myself but here's a suggestion: look through the messages generated by the kernel dmesg or syslog messages to check what messages are generated when you dock/undock. If you do see a notification you should be able to tie the event that generates the message to your script. – dinesh Feb 23 '13 at 16:56
up vote 0 down vote accepted

I found the right tool on top of udev (and other low level interfaces like sysfs), configurable to everyone's taste. It's called laptop-mode-tools one of zilions of Debian packages (available for other distros at

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