On Fri, Jan 25, 2013 at 9:25 PM, Eitan Adler <li...@eitanadler.com> wrote:
> On 25 January 2013 14:51, Kevin Oberman <kob6...@gmail.com> wrote:
>> There are several threads in the archives of acpi@ and mobile@
>> discussing this. Most things are pretty easy. Use xev to find the
>> events generated by the volume buttons.
>
> I'm handling the volume keys with xbindkeys.
>
>>  Mute and the ThinkLight (if
>> your system has one) should work as is.
>
> Mute does not function - I am using xbindkeys to handle it.  The
> "video" key generates no event.
>
>> Brightness is a bit bigger issue as Lenovo has completely revamped it
>> These buttons don't generate events. :-(
>
> Where *should* they be handled?   How do they work on windows?
>
> FWIW they seem to change hw.acpi.video.brightness, but change nothing
> visible on the screen.
>
>> You can install the acpi_call
>> port and use it to set the brightness, but it is a pain as it does not
>> allow for setting incremental changes, only absolute values.(16 of
>> them).
>
> Any pointers for what to look at? I have no idea what I'm doing w.r.t.
> computers ^W ACPI.

Install sysutils/acpi_call
kldload acpi_call
acpi_call -p '\VBRC' -i [0-15]

There seem to be some differences on the range, but in my T530 0=off
and 15=full.

Unfortunately, the brightness functions do not generate X events and I
have not seen any posts on how to tie them to anything to adjust
brightness.
-- 
R. Kevin Oberman, Network Engineer
E-mail: kob6...@gmail.com
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