Here is a strange bug. When I try few distros (Ubuntu 12.10 and mint 14 rc), I noticed I can change the backlight of my Imac27 (Finally !!! main report here : https://bugs.launchpad.net/ubuntu/+source/gnome-power-manager/+bug/818826)
But things goes better now, it work with LiveCD. Once installed (normal mode, not EFI), impossible to change backlight level. It's always on max. I also tried in EFI, but it's the same.
Here is a strange bug. When I try few distros (Ubuntu 12.10 and mint 14 rc), I noticed I can change the backlight of my Imac27 (Finally !!! main report here : https:/ /bugs.launchpad .net/ubuntu/ +source/ gnome-power- manager/ +bug/818826)
But things goes better now, it work with LiveCD. Once installed (normal mode, not EFI), impossible to change backlight level. It's always on max. I also tried in EFI, but it's the same.