FreeBSD no brightness control on Acer laptop

[Székvölgyi Péter]

Hi everyone,

I have a Acer Extensa 5620 laptop and i didn't change the brightness 
with keys or sysctl value.
I loaded asus, ibm and other laptop acpi modul, but nothing change. 
Anyone has an idea how
can i change the brightness fater the system booted? ( Without ACPI i 
can change, the brightness. )

I send a PR too:
http://www.freebsd.org/cgi/query-pr.cgi?pr=132535

Now my system is:
FreeBSD dzsy-note.dzsy.org 7.2-STABLE FreeBSD 7.2-STABLE #0: Thu May  7 
23:13:54 CEST 2009 ... i386

Thanks,
Peter