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    SubjectRe: [PATCH 0/5] Sonypi driver model & PM changes
    On Mon, Oct 25, 2004 at 03:50:36PM +0200, Stelian Pop wrote:

    > The special keys are like KEY_BACK, KEY_HELP, KEY_ZOOM, KEY_CAMERA,
    > and a dozen FN + some key combinations.
    >
    > I can integrate those events into the input layer in 2 different ways:
    >
    > * allocate a new key event (in include/linux/input.h) for each
    > key *and* combination. This will make the keys and the combinations
    > work both on the console and in X.
    >
    > Unfortunately only events under the 0xff limit seem to be
    > propagated to X, the other ones don't generate any X event (I haven't
    > looked at the problem but I suppose it somewhere into the X code).

    The number is 240 and it's the number of possible PS/2 scancode
    combinations, and since at this time X can only understand the PS/2
    protocol (and not native Linux events), this is the only way how to pass
    keypresses to X.

    I believe that although this way may be easier, it leads to madness.

    > showkey does corectly see the keys in raw mode.
    >
    > * allocate a FN key event and let FN be a modifier.
    >
    > This is much nicer (less events allocated in input.h), but I haven't
    > found a way (and I'm not sure there is one) to say to X that Fn is a
    > *new* modifier. Yes, I can say FN act like a Control, Meta or whatever
    > existing modifier, but this is useless since I already have a Control,
    > Alt, etc. key on my keyboard. The whole point is to add support for
    > a new key !
    >
    > I also haven't looked yet at adding a new modifier in the console
    > mode...

    IIRC X has only 8 modifier keys and all are already defined and you
    can't define any more. But I doubt you're using all of them on your
    keyboard. It should be possible to assign Fn to one of them.

    --
    Vojtech Pavlik
    SuSE Labs, SuSE CR
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