Can't adjust brightness on a Sony Vaio T13 ultrabook
- by Alex Barreira
I recently installed Ubuntu 12.04 alongside Windows 7 in a Vaio T13 ultrabook.
I cannot use the the Fn+F4 or Fn+F5 to change the brightness. The bubble appears indicating that brightness is being changed but with no visual impact on the screen.
I've tried many solutions involving the manipulation of the /etc/default/grub file but none of them…