#11712 NORM 1.75-so: OLS backlight disabling needs manual override

[Zarro Boogs per Child]

#11712: OLS backlight disabling needs manual override
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 Reporter:  greenfeld               |                 Owner:  pgf                              
     Type:  defect                  |                Status:  new                              
 Priority:  normal                  |             Milestone:  1.75-software                    
Component:  power manager (powerd)  |               Version:  Development build as of this date
 Keywords:                          |           Next_action:  diagnose                         
 Verified:  0                       |   Deployment_affected:                                   
Blockedby:                          |              Blocking:                                   
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 While using an XO with a window frame partially blocking sunlight, I found
 the OLS sensor turning off the backlight of an XO-1.75 when it saw enough
 sunlight that it presumed the entire display was covered in sunlight.

 But since the XO was partially shaded, this was not the case, and I ended
 up with a display I could not read.

 I manually turned on the backlight using the brightness control, but
 eventually something decided to turn it off again.

 We need a clear way to disable the light sensor's disabling of the
 backlight when in partial and/or varying shade conditions (moving clouds,
 wind-swept trees, etc.).  There also needs to be a way to turn the OLS
 behavior back on again.

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Ticket URL: <http://dev.laptop.org/ticket/11712>
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