Re: Brightness and "touchpad dis-/enable" keys not working for Fujitsu e7x6

[Jan-Marek Glogowski <glogow@fbihome.de>]

Am 22.06.2016 um 14:39 schrieb Michał Kępień:
>> Someone / Something has to generate the keycodes, even if we skip all
>> brightness control. And I get an ACPI event for the FUJ02E3 when I press
>> the keys, but I don't know what to do with it (AKA which DSTD function
>> to call).
> 
> Can you post a DSDT dump of your machine somewhere so that we can take a
> look?
> 
> I played with my Lifebook E744 a bit and there is a chance it is not as
> different from the Skylake machines as I originally imagined.  Earlier
> in this thread, I already mentioned that pure ACPI brightness control
> doesn't work, just like it doesn't work on Skylakes.  However, input
> events are correctly generated when Fn+F6 or Fn+F7 is pressed.

That's no mystery, because the brightness control ACPI device (AKA
FUJ02B1 is available on e7x4 notebooks and the diriver also generates
the keycodes in addition.

The diff between e7x4 and e7x6 DSDT is ~43k lines or 1.3MB
And the DSDT of 736 and 756 is identical.

> And I am
> sure these events are generated by ACPI code as booting with acpi=off
> makes the input events disappear, while also causing brightness to be
> correctly adjusted.  Thus, I can try to figure out which part of the
> ACPI code causes the input events to be generated.  That information
> combined with your DSDT dump might help us in figuring out how to make
> it work for your machine.  However, it might just as well turn out that
> Fujitsu switched to using WMI or some opaque vendor-specific magic.

The ACPI code doesn't generate the keycodes.
Look at the acpi_fujitsu_notify function in
drivers/platform/x86/fujitsu-laptop.c

And sure, without ACPI no ACPI driver will be loaded.

So without ACPI, the brightness buttons work correctly (not that's an
option to run a laptop without ACPI)?

Regards,

Jan-Marek