# recognized by kernel as of 2.6.x:
# these are X keycodes (xev), not kernel keycodes

Stand by:	keycode 223
VolUp:  	keycode 176
VolDn:	  keycode 174
Mute:	  	keycode 160
Play:   	keycode 162
Back:   	keycode 144
Forward:	keycode 153
Stop:   	keycode 164
LCDup:    keycode 212
LCDdn:    keycode 101
Wifi:     keycode 242
CRT/LCD:  keycode 214


# unrecognized by kernel as of 2.6.x:
# using setkeycodes in /etc/rc.local will make them accessible
# then X will assign its own keycodes (as above)

Battery:      scancode 0x87 'setkeycodes e007 <keycode>' to make it known.
Eject:        scancode 0x89 'setkeycodes e009 <keycode>' to make it known.
Hibernate:    scancode 0x8a 'setkeycodes e00a <keycode>' to make it known.
MediaDirect:  scancode 0x92 'setkeycodes e012 <keycode>' to make it known.

setkeycodes e009 122	# e009 eject fn
setkeycodes e012 130	# e012 mediadirect
setkeycodes e00a 123	# e00a hibernate fn


# syntax
setkeycodes <scancode> <keycode>
  e.g. setkeycodes e06f 112


Since kernel 2.6 when you ask for scancodes with showkey, what you get are the keycodes "translated back" to the scancodes. This is called soft raw translation in the kernel. To see the real scancodes (e.g., e00x) add this parameter to your kernel boot line:  atkbd.softraw=0

http://www.mjmwired.net/kernel/Documentation/kernel-parameters.txt

Good info at Arch Forums:

* http://bbs.archlinux.org/viewtopic.php?id=13607

# Xmodmap (OPTIONAL)
# Assigns X keycodes to aliases used by some media apps
# add xmodmap ~/.Xmodmap to .xinitrc

keycode 130 = XF86AudioMedia
keycode 160 = XF86AudioMute
keycode 174 = XF86AudioLowerVolume
keycode 176 = XF86AudioRaiseVolume
keycode 162 = XF86AudioPlay
keycode 144 = XF86AudioPrev
keycode 153 = XF86AudioNext
keycode 164 = XF86AudioStop
keycode 210 = XF86Eject