The Dell designers had the great idea of putting the power button on the outside of the laptop, rather than protected by the lid. So when suspended, it's possible that the laptop will wake up during transport with the power button being accidentally pressed. When the lid is closed, the power button should be disabled as an ACPI wake up device. The power button: http://support.euro.dell.com/support/edocs/systems/latd420/en/PG124en1/about.htm#wp1223065
I obviously forgot to mention that the laptop was a Dell Latitude D420
Is this even possible? It's also probably better to do this from HAL since you want all the quirks in one central place...
The power button doesn't do anything when the lid is closed. Fixed in hardware!