#8006 HIGH 8.2.0 (: joyride-2301: no evidence for improved power management

[Zarro Boogs per Child]

#8006: joyride-2301:  no evidence for improved power management
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   Reporter:  thomaswamm           |       Owner:  cjb                              
       Type:  defect               |      Status:  new                              
   Priority:  high                 |   Milestone:  8.2.0 (was Update.2)             
  Component:  power manager (OHM)  |     Version:  Development build as of this date
 Resolution:                       |    Keywords:  power_manager                    
Next_action:  never set            |    Verified:  0                                
  Blockedby:                       |    Blocking:                                   
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Comment(by rsmith):

 Replying to [ticket:8006 thomaswamm]:

 > With "Advanced Power Management" checkmarked (presumably ON then?), my
 battery lasted only 3.3 hours of steady usage activity until blackout (2.9
 hours to Red LED).  It originally lasted about 3.5 hours when I first
 received it late January 2008 (maybe build 650 or 656).
 >

 Your steady usage may be frequent enough that the autosuspend timer never
 fires. That or perhaps you are running some other application in the
 backgroud or on a VT that prevents autosuspend from happening.

 There is a script in the build called olpc-pwr-log which you can use to
 measure your power consumption levels.  Its mostly intended for debugging
 battery issues but it will give you some insight into whats happening.
 Infomation on the logfile it produces and processing the data is here:

 http://wiki.laptop.org/go/XO_Power_Draw

 If you run this and you want your machine to autosuspend then make sure
 you run it from the a sugar console and not a VT.  Activity on a VT will
 prevent autosuspend from happening.

 > The battery status icon in the frame is very coarse, changing only
 rarely, and possibly non-monotonic too.
 >

 The battery status comes directly from the SOC value reported by the EC.
 There are indeed times when it can be non-monotonic.  You shouldn't see
 any of those on a normal discharge/charge cycle though unless its a NiMh
 battery.  Run a few cycles with olpc-pwr-log running and attach the log
 files.

-- 
Ticket URL: <http://dev.laptop.org/ticket/8006#comment:3>
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