Adjust the brightness of the screen in Ubuntu 10.10

Some graphics cards do not recognize automatically adjusting the brightness of the screen on systems with Ubuntu 10.10 and earlier. However, to resolve this problem, simply change the Grub file. To do this:

  1. Open the console
  2. Enter the command: sudo gedit / etc / default / grub

You can use your favorite text editor (nano, vim ...), but you run the editing of the file as root.
  1. The Grub editor change the line "GRUB_CMDLINE_LINUX_DEFAULT =" quiet splash "with" GRUB_CMDLINE_LINUX_DEFAULT = "quiet splash acpi_osi = Linux", then save it
  2. Return to the console and updated using the command Grub sudo update-grub
  3. Restart the computer and voila!