[Trac #1388] setting dcon to "dcon sleep" mode does not shut off panel in pre-b3

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#1388: setting dcon to "dcon sleep" mode does not shut off panel in pre-b3
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 Reporter:  dilinger  |        Owner:  wad    
     Type:  defect    |       Status:  new    
 Priority:  blocker   |    Milestone:  BTest-3
Component:  hardware  |   Resolution:         
 Keywords:            |  
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Comment (by wmb at firmworks.com):

 Aha, this text from the DCON specification looks relevant (last paragraph
 in the description of Bit 1: DCON Sleep Mode on page 4):

 Exiting Sleep mode may be performed either manually or automatically.
 Under normal circumstances, this bit will be cleared automatically upon
 arrival of an ECPWRRQST.  In other words, pressing a key restores the
 video display independently of the host CPU, thus “instantly” turning on
 the display when a keyboard key, cursor button, or the touchpad has been
 activated (this masks the latency that would otherwise be required for the
 CPU to enable the display). Alternately, if desired, the CPU may exit
 Sleep mode and reinitiate display refresh by clearing this bit to 0.

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Ticket URL: <http://dev.laptop.org/ticket/1388#comment:2>
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