Get the screen brightness keys working in Ubuntu on the Thinkpad E430


Posted on 2014-01-22 in  ubuntu


The hardware on the Thinkpad E430 has thus far worked perfectly in Ubuntu with one exception. The screen brightness function keys. This post on askubuntu explains the problem and solution.

http://askubuntu.com/questions/293925/brightness-buttons-not-working-properly

The fix:

  1. sudo vim /etc/default/grub
  2. Look for the line that says GRUB_CMDLINE_LINUX="" and change it to this: GRUB_CMDLINE_LINUX="acpi_osi=\"!Windows 2012\""
  3. sudo update-grub
  4. Reboot

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