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    SubjectRe: [PATCH] Map volume and brightness events on thinkpads
    On 10/16/07, Linus Torvalds <torvalds@linux-foundation.org> wrote:
    >
    >
    > On Tue, 16 Oct 2007, Matthew Garrett wrote:
    > > >
    > > > It still doesn't mean it belongs inside the stream of data for the keyboard,
    > > > maskerading as a key press.
    > >
    > > But it *is* a key press!
    >
    > To get somewhat back on track: volume and brightness (and similar - lid
    > close etc) events clearly are keypresses.
    >
    > However, I would also argue that a keypress that is acted on by the
    > firmware automatically is *different* from a keypress that hasn't been
    > acted on: one is a "key was pressed *and* hardware did something
    > automatically", and the other is just a "key was pressed" event.
    >
    > IOW, I think the thinkpad issue (and others like it) should be fixed by
    > splitting up the KEY_VOLUMEUP "key" into separate KEY_VOLUMEUP and
    > KEY_VOLUMEUP_NOTIFY key events, so that downstream user mode (and the
    > kernel itself, for that matter) can know whether it's a informational
    > message or whether it should be acted upon.

    I agree that these are 2 different events. My argument is that
    "VOLUME_UP_NOTIFY" event is similar to "BATTERY_OUT_NOTIFY",
    "DOCK_UNDOCK_NOTIFY", etc, etc and should be sent not through input
    layer but through a generic (yet to be designed) notification
    mechanism. Something lighter than input. Something like uevents over
    netlink.


    --
    Dmitry
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