FreeBSD 7.1 laptop screen brightness control

[Székvölgyi Péter]

Hello,

Last week i was install FreeBSD on my Acer Exrensa 5620 laptop.
Everything work fine except the monitor brightness control. If i
disbale the ACPI on boot then i can controlled the brightness level
with FN+left/right key, but without ACPI no battery status, ...

Anyone has an idea wath is wrong? Or anyone have a howto/link
how can i change the brigness level in console with ACPI controll
commands or sysctl?

Sorry about my English.

Regards,
Peter