at 10 percent brightness my screen is at 100%

Question

I have Kubuntu 13.04 installed on an HP envy DV7 with the dual graphics chipsets intel 4000 and Nvidia 630M. And when I try to reduce my screen brightness it doesn´t actually go down until it reaches 10%. I´m running the standard nouveau drivers, no proprietary drivers.

Answer 1

Try it once.. It has solved all problems about brightness! Including mine!!

• Open terminal ( Ctrl+Alt+T ) and type:

  sudo cp /etc/default/grub /etc/default/grub.bak
  sudo gedit /etc/default/grub
  

  You will find this line in the new opened window: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash"

• Change it to:

  GRUB_CMDLINE_LINUX_DEFAULT="quiet splash acpi_backlight=vendor"
  

• Save and close the window and type this in the terminal:

  sudo update-grub
  

• Restart your system..