Brightness keys and booting the kernel

[Nikolay Tychina]

>  > Considering the fact that brightness keys work until kernel is loaded,
>  > is it possible to make them work
>  > after the kernel is booted in some simple way?
>  > I remember my previous laptop was able to control brightness without
>  > any acpi_* modules and disregarding
>  > OS running.
>
> What make and model laptop?  What OS?  (this one, and the previous?)
>
> % head -24 /var/run/dmesg.boot
>
> should provide a clue or two.
>
> cheers, Ian

This is Samsung RV511-S02 which runs FreeBSD 9-RELEASE, previous was
Acer Aspire 5520G running FreeBSD 8-STABLE until it burned away in
2010, and I couldn't find dmesg for it.

Regards


ACPI set debug layer 'ACPI_ALL_COMPONENTS ACPI_ALL_DRIVERS' level
'ACPI_LV_ERROR'
Copyright (c) 1992-2012 The FreeBSD Project.
Copyright (c) 1979, 1980, 1983, 1986, 1988, 1989, 1991, 1992, 1993, 1994
	The Regents of the University of California. All rights reserved.
FreeBSD is a registered trademark of The FreeBSD Foundation.
FreeBSD 9.0-RELEASE #1: Thu Feb 23 18:33:29 MSK 2012
    nicholas at rv511:/usr/obj/usr/src/sys/GENERIC amd64
CPU: Intel(R) Core(TM) i3 CPU       M 380  @ 2.53GHz (2527.05-MHz K8-class CPU)
  Origin = "GenuineIntel"  Id = 0x20655  Family = 6  Model = 25  Stepping = 5
  Features=0xbfebfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,DTS,ACPI,MMX,FXSR,SSE,SSE2,SS,HTT,TM,PBE>
  Features2=0x9ae3bd<SSE3,DTES64,MON,DS_CPL,VMX,EST,TM2,SSSE3,CX16,xTPR,PDCM,PCID,SSE4.1,SSE4.2,POPCNT>
  AMD Features=0x28100800<SYSCALL,NX,RDTSCP,LM>
  AMD Features2=0x1<LAHF>
  TSC: P-state invariant, performance statistics
real memory  = 4294967296 (4096 MB)
avail memory = 3940532224 (3757 MB)
Event timer "LAPIC" quality 600
ACPI APIC Table: <PTLTD  	 APIC  >
FreeBSD/SMP: Multiprocessor System Detected: 4 CPUs
FreeBSD/SMP: 1 package(s) x 2 core(s) x 2 SMT threads
 cpu0 (BSP): APIC ID:  0
 cpu1 (AP): APIC ID:  1
 cpu2 (AP): APIC ID:  4
 cpu3 (AP): APIC ID:  5