Adjust brightness in Kubuntu 12.10 on Acer Aspire One
Fn-Left and Fn-Right do not work to change brightness.
Find the answer here: http://askubuntu.com/questions/112050/acer-aspire-one-d270-can-not-set-brightness
Modify grub config file:
$ sudo vi /etc/default/grub
Change the line:
GRUB_CMDLINE_LINUX=""
into:
GRUB_CMDLINE_LINUX="acpi_osi=Linux"
Then, update grub:
$ sudo update-grub
Reboot