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

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

 * cc: kimquirk, jg (added)
  * summary:  Power Manager for OLPC laptops => OHM Power Manager for OLPC
              laptops

Comment:

 Replying to [comment:21 jg]:
 > have to fish or cut bait.  How's the fishing?

 I tried out OHM today, and am very happy with what I saw -- it dimmed
 brightness with the AC adaptor  going off and on, so it's talking to our
 setup fine.  It doesn't have anything bound to lid/ebook events, though --
 Richard, does that sound right?

 Here's a list of things I think we need before we can ship it in Trial-2,
 for which the deadline is next Monday, so we'd need them by Friday:

  * power button support -- we should suspend whenever the power button is
 pressed
  * lid event -- we should suspend *and* set the dcon to "sleep" mode via
 sysfs on lid close
  * ebook event -- we should `xrandr -o left` on ebook=1, `xrandr -o
 normal` on ebook=0
  * we do *not* require any kind of idleness detection for Trial-2

 jg, Kim, do you agree with these goals?

 Richard (Hughes), could you let us know whether you'd be able to do these
 this week, or whether I should?  Sounds like we have the infrastructure
 for them, which is great.  HAL already broadcasts  the lid and ebook
 events in the latest build, so that should be easy, but:

 HAL doesn't currently see/broadcast the power button -- maybe that's
 because X uses the grab ioctl on the pm_inputdev device, which would mean
 we need to split out the power button into its own (correctly labeled)
 device like we did with lid and ebook.  That's a simple kernel patch; if
 we need to do that, I can get it done quickly.

-- 
Ticket URL: <http://dev.laptop.org/ticket/31#comment:22>
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