Sorry about that. I haven't been using Ubuntu for quite sometime and just recently starting using xubuntu as my main since I don't feel like rebuilding Arch right now
Anywho, it appears things are different in Ubuntu...no surprise there. I found how it's done now via command line, well one way.
sudo chown "username" /sys/class/backlight/acpi_video0/brightness
This allows you to change the video settings. To make sure the numbers are the same as mind do this:
sudo chmod 777 /sys/class/backlight/acpi_video0/brightness
At max mine is set to 7 by default; which you can change that to. So to change the brightness up and down do:
Where 7 is the highest you can go unless you change the max_brightness file.
sudo echo 7 > /sys/class/backlight/acpi_video0/brightness
Did this work for you?