ibm-acpi Linux driver development

Aaron Lewis | 16 May 2012 14:31

Any one worked out the mic mute led on latest X220 ?

Hi,

I'm running latest Arch Linux ( Linux kerenl 3.3+ ) / Ubuntu 12.04 (3.2 +)

I got two problems:

1) acpi_listen has no output of mic mute button on Arch Linux , not
sure if it's bug of kernel or acpid ;

2) I could bind mic mute button in Ubuntu 12.04 ,  with acpid.
 But led won't toggle its light.

Any kernel / acpid patches available ?

Thanks

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Henrique de Moraes Holschuh | 16 May 2012 16:08

Re: Any one worked out the mic mute led on latest X220 ?

On Wed, 16 May 2012, Aaron Lewis wrote:
> 1) acpi_listen has no output of mic mute button on Arch Linux , not
> sure if it's bug of kernel or acpid ;

Check whether it outputs data to the *keyboard* and not through ACPI.

> 2) I could bind mic mute button in Ubuntu 12.04 ,  with acpid.
>  But led won't toggle its light.

Yeah, software control of that LED is still unavailable, and it is not for a
lack of knowing how to toggle it.  The issue is a bit more complicated.

thinkpad-acpi is fully configurable for the hotkey support.  If the mic mute
button is one of the ACPI buttons, at most you need to set the thinkpad-acpi
keymap and enable the button in the hotkey mask.  If Ubuntu has that
working, you can just copy the thinkpad-acpi keymap and hotkey mask from
Ubuntu.

Instructions are provided in Documentation/laptop/thinkpad-acpi.txt.  How to
read/write the input device keymap is distro-specific.

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