Re: 2.6.0_test6: CONFIG_I8K produces wrong/no keycodes for specialbuttons

[Jan Schubert]

Massimo Dal Zotto wrote:

> The inspiron 8000 has 4 multimedia buttons, 2 volume buttons and 3 Fn-key
> combinations. Other Dell laptops have only one or two buttons.
>
> The multimedia buttons generate the following raw scancodes which can be
> dumped with showkey -s:
>
>    0xe0 0x01	play
>    0xe0 0x02	stop
>    0xe0 0x03	back
>    0xe0 0x04	forward
>
> Since the raw scancodes are generate by the keyboard like any other key
> they should be handled by the 2.6.0 kernel as in 2.4.x. If this doesn't
> work it is a bug in the kernel. Did you try showkey -s with 2.6.0?
This is what i get:
play - <nothing>
Stop -
0xe0 0x22
0xe0 0xa2
back - <nothing>
forward-
0x6a
0xea

> For some obscure reason known only to Dell the volume buttons and the Fn-
> keys are trapped by the SMM BIOS and can be read only by the i8k driver
> which under kernel 2.4.x can be programmed to generate the original raw
> scancodes generated by the keyboard:
>
>    0xe0 0x20	fn+vol_mute
>    0xe0 0x2e	vol_up, fn+vol_down
>    0xe0 0x30	vol_up, Fn+vol_up
These keys seems to work, but don't produce any keycodes. The same 
happens when pressing the (special) Volume-keys.

> (SMM BIOS can be programmed to handle volume buttons as normal keys
> by disabling the Fn- key but then you don't have the Fn- function,
> including bios access and suspend)
Suspend and Bios-Setup will work (when accessing the Bios-Setup there is 
no way to come back to my system - this worked some time ago).

> Unfortunately the keyboard interface has changed in 2.6.0 and it is not
> possible to generate the 0xe0, 0x0N sequence as in 2.4.x, so this feature
> has been disabled and you must use i8kbuttons instead. If anybody knows
> how to generate the corresponding scancodes in kernel 2.6.0 please let
> me know.
Is i8kbuttons usable for the play, stop, back and forward-button? This 
would be new to me, AFAIK you can only map the volume-keys.

toral distfiles # i8kbuttons --help
Usage:  i8kbuttons [<option>...]

Options:

       -v|--verbose
       -u|--up <command>
       -d|--down <command>
       -m|--mute <command>
       -r|--repeat <milliseconds>
       -t|--timeout <milliseconds>

Thx, Jan

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