Comment 15 for bug 264287

This bug affect me too. I've a Notebook Toshiba M50-140 with the "new" git version of omnibook driver who enable the multimedia keys. I'have (k)ubultu jaunty with kde 4.2.3 and I've mapped the hotkey, as is wited in this guide http://people.freedesktop.org/~hughsient/quirk/quirk-keymap-index.html. Some key are mapped with zoomin and zoomout keycodes, 0x1a2 and 0x1a3 keycode's number respectively. I've noted that all >255 keycodes doesn't work in jaunty (no xev event).
I've read this file /usr/include/linux/input.h and before of defining >255 keycodes there is this comment: "Range 248 - 255 is reserved for special needs of AT keyboard driver". What does it mean?
Thanks