> The handlers that are probably deprecated are mostly those for ASUS and
> Toshiba hardware, which no one who works on this package has direct access
> to.

At least on Asus notebooks everything should be handled through the
kernel, with the asus-laptop module.

> Could you please run acpi_listen and show the actual ACPI events generated
> for each of these keys? This may be important later in case a different
> ASUS model isn't being handled correctly in the kernel yet.

The eeepc-laptop driver generates ATKD events in the range 0x20 to 0x2f,
depending on the current brightness, where 0x20 is the lowest setting
and 0x2f is the highest. For instance:

increment:
hotkey ATKD 0000002c 00000003
hotkey ATKD 0000002e 00000006

decrement:
hotkey ATKD 0000002c 00000004
hotkey ATKD 0000002a 00000004

This conflicts with the asus-brightness-down acpid event, which matches
all of these events, no matter if the brightness is actually incremented
or decremented.

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https://bugs.launchpad.net/bugs/955176

Title:
  Brightness hotkeys misdetected on Eee Pc

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