Cannot change brightness or use xrandr in macbook pro

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https://bbs.archlinux.org – does your mac have Nvidia or Ati or Intel graphic card, if it is Nvidia install the nvidia drivers and run nvidia-utilities then edit and add the following under device Option "RegistryDwords" "EnableBrightnessControl=1" if not install pommed and nvidia-bl from AUR if that doesnt work then check the wiki for macs books and follow the instructions on compiling the special nvidia-bl hope that helps xcabal https://bbs.archlinux.org/profile.php?id=62294 2012-08-08T05:30:01Z (HowTos)