> On 05/01/12 10:13, Nikolay Tychina wrote:
>>>
>>> > 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@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
>> _______________________________________________
>>
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>>
> I know that Thinkpads (obviously not the same but the information may be
> useful) start in "BIOS" mode, where acpi does not handle most hotkeys,
> brightness etc. So the brightness keys work. As soon as acpi attaches,
> however, it "trapdoors" into ACPI mode, where it expects Windows or Linux
> drivers to handle hotkeys and call either acpi video extensions or other
> ACPI methods to initiate display changes and brightness. Have you tried
> using the acpi_video module?
> The reason it works during early kernel and prior on Thinkpads is due to the
> fact it hasn't been "trapdoored" into ACPI mode yet.
>
> Matt
settings through ACPI. So we have to poke around in the BIOS to do
Locked
