I still don't know what takes care of listening to kernel dock/undock events in kubuntu, but this is definitely not an X bug. Either the kernel is not propagating the events (unlikely), or kde isn't listening to them.
Randomly picking a likely sounding kde package and forwarding it over there. ** Package changed: xserver-xorg-video-intel (Ubuntu) => kde-baseapps (Ubuntu) -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xserver-xorg-video-intel in Ubuntu. https://bugs.launchpad.net/bugs/427846 Title: Thinkpad T400s laptop dock events not enabling/disabling external display To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/kde-baseapps/+bug/427846/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp