[coreboot] mute button on X200

Sat Aug 22 16:59:00 CET 2015

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I haven't got anywhere yet, but I did notice that factory BIOS defines
a table called ECDT, while coreboot doesn't. iasl shows this as being
related to the EC. I can see different ectool output (using the -i
option) option on different runs, even without changing the
mute/unmute status, and also some changes when muting, but I haven't
managed to figure it out yet.

Would it help if I include logs here? If so, which logs?

On 22/08/15 16:07, Alexander Couzens wrote:
>> Thanks, I'll take a look. It doesn't seem like the mute button
>> is controlled by ACPI, though.
>> 
>> Perhaps I could use ectool (and other utils?) to see what happens
>> when muting.
> 
> maybe, maybe not. acpi_listen only helps you, when something in the
> user space is missing. It'll show you what acpi event is generated
> from acpi code. But when the acpi code is missing, you don't see
> anything there. Take a look on the ubutun wiki and do the kernel
> debug thing it's described there.
> 
> ectool might show you what's changed, but I would bet, the ec is
> generating an ACPI query event, which must be handled by _Qxx
> function.
> 
> cheers, lynxis
> 
> 
> 

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