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[Bug 818826] Re: backlight brightness control won't work in 2011 iMac 27"

To: desktop-packages@xxxxxxxxxxxxxxxxxxx
From: artik <818826@xxxxxxxxxxxxxxxxxx>
Date: Fri, 27 Jan 2012 18:33:38 -0000
Reply-to: Bug 818826 <818826@xxxxxxxxxxxxxxxxxx>
Sender: bounces@xxxxxxxxxxxxx

Affected also.

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https://bugs.launchpad.net/bugs/818826

Title:
  backlight brightness control won't work in 2011 iMac 27"

Status in “gnome-power-manager” package in Ubuntu:
  Confirmed

Bug description:
  When I press the 'Brightness Control(UP, DOWN)' key in Apple Keyboard,
  the OSD shows Increasing Backlight(or Decrease) at the right-top corner.
  But the Screen Brightness doesn't changed. 

  Also, I waited 15 minutes, the screen turned black. (Power Setting)
  But the Backlight still alive.

  This iMac has AMD Radeon HD 6970M.
  I think maybe it's because the driver doesn't exist in kernel module.

  Sorry about my poor English and few information.

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