Bug#404416: #404416: chipset?

["Marco Cornolti" <cornolti@cli.di.unipi.it>]

I'll tell about a little clue that may help to find out where the bug is.
The strange behaviour is this one:
Normally, when i click on a button on the display (i.e. the 'minimize  
window' button), it looks pressed while the touchpad button is pressed,  
and looks unpressed when the button is released. The action called by the  
button starts when it's released.
Well, when the computer is using the battery, all works like this, but  
when i plug the AC adapter, the behaviour is different: when i click the  
button it looks pressed, then i release the touchpad button and the  
display button remains still pressed. Nothing happens until i move the  
pointer. When i move, the button gets released and the action gets  
performed.

???

Marco