thinkpad keys T520

[Sean Bruno]

On Tue, 2013-03-12 at 15:56 -0700, Kevin Oberman wrote:
> On Tue, Mar 12, 2013 at 2:57 PM, Sean Bruno <seanbru at yahoo-inc.com>
> wrote:
>         the Fn key seems to send the system the same key command as
>         the power
>         button *should* send.  This leads to many problems on this
>         machine.
>         
>         How can I start tracing code the key strokes for keys that are
>         not the
>         normal keyboard keys?  e.g. the Fn key or vol up/down and the
>         power
>         button?
>         
>         If I load acpi_ibm(4), it doesn't seem to ever get used so I
>         am confused
>         as to where to start.
>         
> Sean,
> 
> I'm confused. I also have a T520, but the Fn key does not seem to
> mis-behave on it at all. I have not gotten brightness adjustment to
> work correctly to this point, but Fn has never triggered a power
> operation for me. Your statement about acpi_ibm(4) is also baffling as
> I have no problems with it with 9.1-Stable or head. It was broken in
> some earlier versions before the Lenovo ID was added.
> 
> Does your ThinkLight turn on and off if you set
> dev.acpi_ibm.0.thinklight? When you press Fn+PgUp? Both work on my
> T520.
> 
> Perhaps I am not completely understanding the issue.
> 
> -- 
> R. Kevin Oberman, Network Engineer
> E-mail: rkoberman at gmail.com


On my T520, I do not need acpi_ibm(4) for the thinklight to function.
It works with/without the module loaded.

Hiren and I found adding this to the driver section of xorg.conf allows
the fn-brightness keys to work:
Option         "RegistryDwords" "EnableBrightnessControl=1"

The audio "mute" button actually seems to be working through the sound
driver.

The fn key seems to generate an unhandled APIC0 event, that is processed
somewhere as a shutdown event.  I'm using XFCE4 as my desktop and all
the parts that come with it.

Sean