I got brightness control to basically (but not perfectly) work on my ASUS G75VW-DH72 by following these steps:
- Add the line
Option "registryDwords" "EnableBrightnessControl=1" in the appropriate Device section of the
sudo pico /etc/default/grub and add
acpi_osi=Linux and acpi_backlight=vendor to the GRUB_CMDLINE_LINUX_DEFAULT variable. Press Ctrl+O to save.
sudo update-grub to rebuild
It's not working perfectly for me yet; I have to press the backlight hotkey twice before it registers, and then when it registers it increments the brightness by 2 instead of by 1, so I only have 6 accessible brightnesses. You can do better by directly writing integers into
/sys/class/backlight/asus-nb-wmi/brightness. If you find solutions to those problems, please let me know!
The nvidiabl thing did not work for me at all when I tried it.
This page is a useful resource: