I'm using Linux Mint 15, which is based on ubuntu raring so it may work for you too. My brightness keys are working, but I had to update my BIOS to latest ver. 214. I was using ver. 206 before with no luck.
I also had to change /etc/acpi/events/asus-keyboard-backlight-up and /etc/acpi/events/asus-keyboard-backlight-down to listen to the correct event on keypress, acording to acpi_listen.
I'm using Linux Mint 15, which is based on ubuntu raring so it may work for you too. My brightness keys are working, but I had to update my BIOS to latest ver. 214. I was using ver. 206 before with no luck.
I also had to change /etc/acpi/ events/ asus-keyboard- backlight- up and /etc/acpi/ events/ asus-keyboard- backlight- down to listen to the correct event on keypress, acording to acpi_listen.
Let me know if you need more info.