I'm running Ubuntu 10.10 on a Cr48. I'm attempting to bind xbacklight -dec 10 to f6 (decrease brightness in chrome os) and xbacklight -inc 10 to f7 (increase brightness in chrome os). The decrease command works fine, but the increase command appears to have no effect. It's the same whether I run the command from the command line or use the bindings I set in CompizConfig Settings Manager.