Okay, I did some more digging regarding the F4-F6 keys: turns out older
macbooks had no secondary functionality for those keys, so the lookup
table in drivers/hid/hid-input.c reads:
static struct hidinput_key_translation apple_fn_keys[] = {
{ KEY_BACKSPACE, KEY_DELETE },
{ KEY_F1, KEY_BRIGHTNESSDOWN, APPLE_FLAG_FKEY },
{ KEY_F2, KEY_BRIGHTNESSUP, APPLE_FLAG_FKEY },
{ KEY_F3, KEY_CYCLEWINDOWS, APPLE_FLAG_FKEY }, /* Exposé */
{ KEY_F4, KEY_FN_F4, APPLE_FLAG_FKEY }, /* Dashboard
*/
{ KEY_F5, KEY_FN_F5 },
{ KEY_F6, KEY_FN_F6 },
{ KEY_F7, KEY_BACK, APPLE_FLAG_FKEY },
{ KEY_F8, KEY_PLAYPAUSE, APPLE_FLAG_FKEY },
{ KEY_F9, KEY_FORWARD, APPLE_FLAG_FKEY },
{ KEY_F10, KEY_MUTE, APPLE_FLAG_FKEY },
{ KEY_F11, KEY_VOLUMEDOWN, APPLE_FLAG_FKEY },
{ KEY_F12, KEY_VOLUMEUP, APPLE_FLAG_FKEY },
{ KEY_UP, KEY_PAGEUP },
{ KEY_DOWN, KEY_PAGEDOWN },
{ KEY_LEFT, KEY_HOME },
{ KEY_RIGHT, KEY_END },
{ }
};
Changing the F4, F5 lines to:
{ KEY_F5, KEY_KBDILLUMDOWN, APPLE_FLAG_FKEY },
{ KEY_F6, KEY_KBDILLUMUP, APPLE_FLAG_FKEY },
Adds the desired functionality (that is you get key codes in xev when
pressing fn+F5/F6). However, it does not affect the backlight state of
my keyboard (running pommed 1.18).
Key observations:
KEY_FN_F* does not produce key codes in xev.
KEY_KBDILLUMUP, KEY_KBDILLUMDOWN seems to be the correct setting for fn+F5,
fn+F6. Looking at the source, no constant seems to have been defined for the
dashboard key... APPLE_FLAG_FKEY specifies the default key state.
This cannot be fixed dynamically. As it's unrelated to the fn key
problem I won't add it to the above patch. However, I've included a
compiled hid module for amd64, with the above changes (it also has my
patch applied so the fn key will work out of the box without the dynamic
quirk).
I consider the fn key problem fixed. Hopefully someone with more
experience than me will commit this patch to the source so that it makes
it into the next update cycle ;)
** Attachment added: "hid.tar.gz"
http://launchpadlibrarian.net/14649798/hid.tar.gz
--
fn key doesn't work in hardy with macbook pro fourth generation (4,1)
https://bugs.launchpad.net/bugs/207127
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