#31 BLOC Trial-2: OHM Power Manager for OLPC laptops

[Zarro Boogs per Child]

#31: OHM Power Manager for OLPC laptops
-----------------------------+----------------------------------------------
  Reporter:  jg              |       Owner:  hughsient at gmail.com
      Type:  task            |      Status:  new                
  Priority:  blocker         |   Milestone:  Trial-2            
 Component:  infrastructure  |     Version:                     
Resolution:                  |    Keywords:  power              
  Verified:  0               |  
-----------------------------+----------------------------------------------
Comment (by cjb):

 Replying to [comment:35 hughsient at gmail.com]:
 > Status update:
 >
 > * lid status reporting now works, and suspends the system.

 Great!

 > * xrandr works, but it the logic might be the wrong way round if you
 know what i mean

 Sure, no problem.

 > All code is in git.
 >
 > Questions:
 >
 > * when the lid closes, do i have to do dpms off or echo 1 >
 /sys/devices/platform/dcon/sleep, or both, or neither?

 Let's go with sysfs for now -- echo 1 on lid close, echo 0 on lid open.

 > * can we assume the lid is open and the machine is in normal mode when
 the xo is powered on?

 The state will be set correctly by the kernel, so if the lid is closed
 between powering up and when ohm starts, ohm should notice that
 lid==closed when it starts, and do the DCON sleep then.  It's the same for
 ebook mode -- when the kernel boots, it finds the current state of each
 sensor, and sets the input layer state accordingly.  HAL then queries that
 state the first time through hald-addon-input, using an ioctl, so it gets
 it right.  We haven't tested this recently, so let me know if it seems to
 misbehave at all.

 Thanks very much once again, this is absolutely superb work.

-- 
Ticket URL: <http://dev.laptop.org/ticket/31#comment:37>
One Laptop Per Child <http://laptop.org/>