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"
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"