Keenan Pepper napsal(a):
> So, let me get this straight.
> 
> When the state changes from AC → battery → AC, or from battery → AC →
> battery, g-p-m should forget the temporary setting and use the permanent
> one from GConf.
> 
> However, when the state changes from busy → idle → busy, g-p-m should
> remember the temporary setting.
> 

This is sensible but still not enough IMO. Imagine you're working on 
unstable power network and/or have bad contact in your power supply. 
AC/battery status changes then pretty frequently and display brightness 
blinks accordingly. So g-p-m should also
1) check, if this event isn't too soon after previous one and if it is, 
change setting back to temporary one
2) if there are more frequent changes, take "conservative" approach at 
swithing backlight (change brightness after some sensible timeout)

-- 
Backlight no longer under my control on battery
https://bugs.launchpad.net/bugs/131885
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