I'm trying to change my laptop brightness (Toshiba l505). Fn keys don't work, but I don't mind. xbacklight doesn't work, and I can't seem to get sysctl to work. I've loaded acpi_video, but whenever I do: Code: sudo sysctl hw.acpi.video.<device>.active it says unknown oid. I've tried lcd, crt, tv, lcd0, crt0, and tv0 as the <device> and it always says unkown oid. I've also tried acpi_toshiba. I've tried: Code: sudo sysctl hw.acpi.toshiba.lcd_brightness=0 But it still says unknown oid. This max brightness is hurting my eyes. x( Any help is appreciated.