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I picked up an hp dm3t laptop with intel HD graphics and installed ubuntu 10.10 64 bit on it. It works great -- the only problem is that the brightness controls on the keyboard don't work. The brightness is always at full. When I try to adjust it down, the indicator graphic indicates that it's going down but the actual brightness doesn't change. Is there anything that I can try to make this work? I'd really appreciate any help.

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must be the intel HD for me with an HP and nvidia. try tweaking the driver – RobotHumans Dec 30 '10 at 1:30
What should I tweak and where? Thanks – James Dec 30 '10 at 5:06
  1. Run this command:

    sudo gedit /etc/default/grub
  2. Change the line:



  3. Then run:

    sudo update-grub
  4. Restart Linux.

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