Screen brightness setting always reverted to dim on boot-up.
Followed instructions in blue at: http://forums.linuxmint.com/viewtopic.php?f=42&t=45271&p=378949&hilit=xbacklight#p378949
installed xbacklight. added acpi_backlight=vendor to grub file. created custom keybinding for xbacklight +50 and xbackglight -50