Hi there

Let me add my two cents on the Toshiba side.

2018-06-04 8:23 GMT-06:00 Hans de Goede <hdego...@redhat.com>:

>
> 1) drivers/platform/x86/toshiba_acpi.c
>
> I don't know how the key on Toshiba's behaves on models where
> it is hardwired / under Windows

With Toshiba we have two types of hardware implementations:

1st gen keyboards, supporting AUTO and FN-Z
AUTO - Turns on/off automatically after some (configurable) time
FN-Z - Creates "toshiba::kbd_backlight" and it's toggled by userspace

2nd gen keyborads, supporting AUTO, ON and OFF
AUTO - Ditto
ON - Always on
OFF - Always off

The second gen keyboards are completely driven by hardware,
userspace must be checking sysfs for "kbd_backlight_mode"
changes, however, the Toshiba interface emits the 0x92
ACPI event when we have a kbd mode change, but it's not
currently being transmitted to userspace via netlink.


Saludos
Azael


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