[Bug 477828] Re: When I use Fn+key increase/decrease brightness, Powerdevil brightness OSD is displayed but brightness doesn't change

[Daniel Rocher]

Perhaps it's not a KDE problem. When I debug PowerDevilDaemon, this test is always false (line 765 PowerDevilDaemon.cpp) :
    if ((currentBrightness == d->cachedBrightness) && !d->brightnessInHardware)

because value of currentBrightness changes before this method when I use
Fn+key (by HAL or Kernel ?) but brightness on my laptop don't change.

For example, when I use  "Decrease Screen Brightness" key (Fn+key): 
     d->brightnessInHardware = false
     currentBrightness=77
     d->cachedBrightness=88

This patch solves problem for my laptop with KDE (this is a workaround).


** Attachment added: "PowerDevilDaemon.cpp.diff"
   http://launchpadlibrarian.net/35370036/PowerDevilDaemon.cpp.diff

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When I use Fn+key increase/decrease brightness, Powerdevil brightness OSD is displayed but brightness doesn't change
https://bugs.launchpad.net/bugs/477828
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