My Problem: Since Ubuntu 10.04 I can no longer adjust the background brightness of the built in LCD-Panel. The Laptop (Samsung Aura R700 Dillen - Nvidia 8600M GT GPU) is always on a very low brightness-level. Since Ubuntu 11.04 the below detailed solution doesn't work any more.
In Ubuntu 10.04 the solution to the backlight problem was rather "simple":
- Open nvidia-settings and create/save and merge a xorg.conf file.
- Open a Terminal and:
sudo gedit /etc/X11/xorg.conf
- Once opened, in the "Device" section, add this line:
Option "RegistryDwords" "EnableBrightnessControl=1"
- Save and exit. Reboot the machine.
I want to do the same thing in Ubuntu 11.10, because this takes care of the brightness-adjust problem.**
How can I safely create and edit xorg.conf in Ubuntu 11.10? I can't find it and a lot of ppl suggest different methods how to create it again. Some are known to cause the computer to not boot correctly.
- Adding the Voria-Tools PPA is not an option. I don't like installing untrusted PPA's. Also, I tried this before and it never worked.
- I have tried the steps mentioned in the link Oli posted. A few of those steps made Ubuntu hang during bootup (editing Grub to add the ACPI-line for example; it always typed in something different - something was buggy there).