Brightness control in FreeBSD 10.1-RELEASE

[Avinash Sonawane]

Hello!

# uname -a
FreeBSD titanic.rootkea.me 10.1-RELEASE FreeBSD 10.1-RELEASE #0
r274401: Tue Nov 11 21:02:49 UTC 2014
root at releng1.nyi.freebsd.org:/usr/obj/usr/src/sys/GENERIC  amd64

My brightness control keys don't work. When I press "Decrease
brightness" key nothing happens whereas when I press "Increase
brightness" key the continuous string of . (dot) appears on the
application running in foreground.

I tried `kldload acpi_video` but then when I tried to decrease the
brightness at first nothing happened and the suddenly brightness
dropped to minimum. Then when I tried to increase the brightness to
normal by pressing "Increase brightness" key the system went to reboot
automatically.

So how do I control the brightness of my FreeBSD box?

-- 
Avinash Sonawane (RootKea)
PICT, Pune
http://rootkea.wordpress.com