[Trac #1404] Power-off with 3 or more game keys pressed

[Zarro Boogs per Child]

#1404: Power-off with 3 or more game keys pressed
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 Reporter:  wmb at firmworks.com    |       Owner:  David.Lin
     Type:  defect               |      Status:  new      
 Priority:  blocker              |   Milestone:  BTest-3  
Component:  embedded controller  |    Keywords:           
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 If you hold down 3 or more game keys shortly after power-on, the XO will
 power-off shortly after OFW turns on the screen.

 To reproduce,

 a) flash the q2c10b firmware from http://dev.laptop.org/~wmb/q2c10b.rom
 (the problem also happens with q2c10.rom, but q2c10b is more reliable
 in other ways, so the multi-button problem shows up more clearly).

 b) Turn on the power by pressing the power button and releasing it.

 c) Immediately (within 1 second after pressing the power button) press and
 hold 3 or more game keys.  The easy way to do this is to press all 4 game
 keys above the power button with your thumb, but other combinations of 3
 games keys have the same effect.

 d) The screen will turn on, then immediately turn off, and the power will
 go off one second later.  Note that the power button is *not* being held
 down at this time, so the behavior cannot be explained as normal power-
 button power-off.

 e) The next time that you power on, the screen will not even come on.  If
 you have a serial port connected, you will see that OFW is hanging when it
 tries to use EC access to reset the wireless LAN.  To recover from this
 state, you must hold the power button for 4 seconds.

 The same bad behavior can be triggered by pressing and holding one game
 key before pressing the power button.

 The bad behavior does not occur if you first press the power button, then
 hold down 1 or 2 game buttons.

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Ticket URL: <http://dev.laptop.org/ticket/1404>
One Laptop Per Child <http://laptop.org/>