configuring dpms

[Louis E Garcia II]

I'm on fc6 laptop with 945gm video. The default display off time is 20
min. I would like to change that to 5 min. I added Option  "OffTime" "5"
under ServerFlags section of xorg.conf like the man page said but didn't
work. The only thing that worked is xset dpms 0 0 300. Is their a system
wide way of doing this? I guess I can put xset command in rc.local but
xorg.conf should be the way to go.

-Louis