#8894 HIGH Not Tri: Synaptics touchpad takes two seconds to wake up after resume

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#8894: Synaptics touchpad takes two seconds to wake up after resume
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     Reporter:  wad       |        Owner:  dsaxena       
         Type:  defect    |       Status:  new           
     Priority:  high      |    Milestone:  Not Triaged   
    Component:  kernel    |      Version:  not specified 
   Resolution:            |     Keywords:  CL1-A touchpad
  Next_action:  diagnose  |   Spec_stage:  unknown       
    Blockedby:            |     Blocking:                
Spec_reviewer:            |     Verified:  0             
Spec_reviewed:  0         |  
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Comment(by dilinger):

 Replying to [comment:3 dsaxena]:
 > Quick skim of the serio/i8042/mousedev codebase shows that the
 suspend/resume path is pretty complicated. We need need to suspend the
 touch pad driver, the serio driver, i8402 driver, the mousedev driver, the
 input layer,  and then resume them all and in the process we are doing a
 full i8042 device reset and self-test.

 Note that we shouldn't be doing a full 8042 device reset/self-test if we
 detect an XO; there are specific checks for that.  Waking up via key press
 means that the key press gets lost if we do an 8042 reset.

 Inside of hgpk_reconnect() (which serio calls in its resume path), we only
 do a psmouse_reset iff we're on B2+ and not doing a power-management-
 resume event.  synaptics_reconnect() presumably needs something similar.

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Ticket URL: <http://dev.laptop.org/ticket/8894#comment:7>
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