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How can I get the brightness on my ASUS G75 laptop to work in Ubuntu 12.10 alpha?

On my MacBook Pro, there used to be an nvidia-bl-dkms module. On my Dell XPS 15z, it worked out of the box. Now I am a little bit stumped and need help.

I've got the nvidia-current 304.43 drivers installed.


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I got brightness control to basically (but not perfectly) work on my ASUS G75VW-DH72 by following these steps:

  1. Add the line Option "registryDwords" "EnableBrightnessControl=1" in the appropriate Device section of the /etc/X11/xorg.conf file.
  2. Do 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.
  3. Run sudo update-grub to rebuild grub.cfg.
  4. Reboot.

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:

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