I can confirm the same behaviour. Running Hardy (updated as of 5 May) on a Dell Latitude D620.
When the undock button is pressed the system frozes and keeps unresponsive even to SysRq combinations. After rebooting the following is registered at /var/log/messages: "ACPI: \_SB_.PCI0.PCIE.GDCK - undocking" -- Thinkpad X61 hangs when removing from dock https://bugs.launchpad.net/bugs/189185 You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs