[acpi-jp 3093] Re: Update on ACPI with FreeBSD CURRENT on ThinkPad T30

[Grover, Andrew]

> From: owner-acpi-jp at jp.FreeBSD.org 
> [mailto:owner-acpi-jp at jp.FreeBSD.org] On Behalf Of Randy Bush
> > Try using the sysctls from the new acpi_video module to turn off the
> > backlight, perhaps by turning the brightness way down.
> 
> i am on a t40p and have tried a lot of this to no avail.

My understanding is that actually turning off the backlight is not done
via _BCM. But, I still don't know exactly how it *is* done. _PS3 might
do it, but some people have hinted that this is something that the video
driver is supposed to know how to do.

Regards -- Andy