Comment 102 for bug 542660

Kapouer :

If I remembre well, here is the source code : http://www.felipe-alfaro.org/blog/2006/09/11/basic-backlight-support-for-macbook-pro/ It works perfectly on my Imac27.

I also found something interesting : I can boot LIVE lastest ubuntu (32 or 64) using these steps :

- Boot on ubuntu CD (by pressing C key)
- Press F6, then ESC
- replace "quiet splash" by "nomodeset xforcevesa acpi=off"

Live is wroking. I tried to replace in /etc/X11/xorg.conf device "vesa" by "radeon", then log off / log on .... black screen.

let see what you suggest me. "Or boot from ubuntu 11.04 live cd... is that what you tried ? it worked well for me.". Yes, it's what I tried. still black screen. Jeremy told me patches are available here : https://bugs.freedesktop.org/show_bug.cgi?id=26891

didn't tried then, and don't know how to ;)