Andy, as an early follow up, does it make any difference whether you plug/unplug AC power directly on the notebook, or on a docking station/port replicator? Do you have more than one power brick with different power ratings (e.g. 65W and 90W)? Because AFAIK you really should get a 0x6040 every time the AC power adapter state changes. -- "One disk to rule them all, One disk to find them. One disk to bring them all and in the darkness grind them. In the Land of Redmond where the shadows lie." -- The Silicon Valley Tarot Henrique Holschuh -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html