#8137 HIGH Not Tri: Backlight does not turn off when the lid is closed and the laptop suspended automatically

[Zarro Boogs per Child]

#8137: Backlight does not turn off when the lid is closed and the laptop suspended
automatically
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   Reporter:  benzea  |       Owner:  cjb          
       Type:  defect  |      Status:  new          
   Priority:  high    |   Milestone:  Not Triaged  
  Component:  kernel  |     Version:  not specified
 Resolution:          |    Keywords:  relnote      
Next_action:  design  |    Verified:  0            
  Blockedby:          |    Blocking:               
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Comment(by dsaxena):

 Replying to [comment:8 cjb]:
 > To reiterate what I'm asking for from the kernel:
 >
 >  * When entering "idle-suspend" mode, I want a lid close transition
 after the suspend to wake us and deliver the event to userspace so that we
 can turn off the backlight.
 >  * When entering "sleep" mode (through a power button press), I want a
 lid close transition to be totally ignored and for the laptop to stay
 asleep.
 >
 > Since both of these modes are just seen as a suspend by the kernel, we
 would need a signalling method for userspace to tell the kernel which type
 of suspend is about to happen, so that it can reprogram the GPIO lid
 transition triggers appropriately.

 I don't think we need a new suspend mode for the kernel, we just need to
 export the LID wakeup-event to user space to enable/disable. This is
 theoretically available in
 /sys/devices/platform/lid/power/wakeup, I just need to connect it to low
 level driver
 bits in olpc-pm.c.

 (Long term, everything in /sys/power/wakeup_events needs to be replaced by
 the proper /sys/devices/<foo>/power/wakeup file).

-- 
Ticket URL: <http://dev.laptop.org/ticket/8137#comment:10>
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