#9180 NORM Not Tri: EC should disable keyboard and mouse in ebook mode

[Zarro Boogs per Child]

#9180: EC should disable keyboard and mouse in ebook mode
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           Reporter:  wmb at firmworks.com    |       Owner:  rsmith       
               Type:  defect               |      Status:  new          
           Priority:  normal               |   Milestone:  Not Triaged  
          Component:  embedded controller  |     Version:  not specified
         Resolution:                       |    Keywords:               
        Next_action:  never set            |    Verified:  0            
Deployment_affected:                       |   Blockedby:               
           Blocking:                       |  
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Comment(by wmb at firmworks.com):

 Replying to [comment:1 gnu]:
 > Does this f5 command also reduce the power used by the kbd/mouse?

 I don't know at the moment.  One would have to measure to be sure.  In
 principle, when the device is in disabled state, it could avoid polling
 the key matrix; it's unclear how much power that uses.  Probably not a
 lot.

 > Or would that involve a separate and possibly more complicated
 interaction with them?

 There is a way to put the ALPS touchpad in a deep-sleep state that saves a
 little power.  I hesitate to do that because you would need a
 significantly more complex wakeup sequence afterwards.  I'm pretty sure we
 don't have the resources to do all the testing that would require.  Also,
 the new Synaptics-based keyboard subsystem is rather different in that
 regard, so all the work would need to be done twice.

 The f5/f4 commands are ancient, dating back at least to the PC/AT model 60
 and probably before that, so they are pretty "safe" and well understood.

 > Does the EC already send the same sequence on a lid-close suspend?  If
 not, wny not?

 On a lid close suspend, the OS can do the work of telling the devices,
 including the keyboard, what to do.  That's not the case for ebook-mode-
 entered-during-suspend.

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Ticket URL: <http://dev.laptop.org/ticket/9180#comment:3>
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