kern/43504: No brightness adjusting support on HP Probook

[demelier.david%gmail.com@localhost]

>Number:         43504
>Category:       kern
>Synopsis:       No brightness adjusting support on HP Probook
>Confidential:   no
>Severity:       critical
>Priority:       medium
>Responsible:    kern-bug-people
>State:          open
>Class:          sw-bug
>Submitter-Id:   net
>Arrival-Date:   Thu Jun 24 19:35:00 +0000 2010
>Originator:     David DEMELIER
>Release:        -current
>Organization:
>Environment:
NetBSD Melon.malikania.fr 5.99.31 NetBSD 5.99.31 (Melon) #0: Thu Jun 24 
18:55:01 CEST 2010  
root%Melon.malikania.fr@localhost:/usr/obj/sys/arch/amd64/compile/Melon amd64
>Description:
Like all HP laptops (almost) I can't adjust the laptop brightness using fn + f7 
or f8 keys.

If I boot without ACPI, I can adjust it.
>How-To-Repeat:

>Fix: