Xmodmap and xbindkeys to disable Media buttons

Dell Vostro 1510 have weird problem with constant permanent media button - stop.

Here is log of my changes that I did on Fedora(I hope this will help fro Ubuntu too):
 To get code you can use "xev" or "xbindkeys -k", for my media button only second approach is working.


gedit ~/.xbindkeysrc
"NoCommand"
    m:0x0 + c:171
"NoCommand"
    m:0x0 + c:172
"NoCommand"
    m:0x0 + c:173
"NoCommand"
    m:0x0 + c:174
"NoCommand"
    m:0x0 + c:215
"NoCommand"
    m:0x0 + c:216
"NoCommand"
    m:0x0 + c:208
"NoCommand"
    m:0x0 + c:209
"NoCommand"
    m:0x0 + c:121
"NoCommand"
    m:0x0 + c:234


gedit ~/.Xmodmap


keycode 171 = NoSymbol
keycode 172 = NoSymbol
keycode 173 = NoSymbol
keycode 174 = NoSymbol
keycode 215 = NoSymbol
keycode 216 = NoSymbol
keycode 208 = NoSymbol
keycode 209 = NoSymbol
keycode 121 = NoSymbol
keycode 234 = NoSymbol

press Alt+F2
launch "gnome-session-properties"
add "usr/bin/xbindkeys"

Restart is required.

Results:
Looks like Stop button does not work, no sign is shown on the screen. Issue is not reproduced for now:
http://askubuntu.com/questions/76410/black-area-with-stroked-circle-on-the-screen

Sources:
http://www.nongnu.org/xbindkeys/
http://cweiske.de/howto/xmodmap/allinone.html
http://forums.opensuse.org/english/get-technical-help-here/laptop/406877-multimedia-keys-dell-vostro-1510-suse11-1-a.html
https://wiki.archlinux.org/index.php/Lenovo_Thinkpad_T61
https://wiki.archlinux.org/index.php/Xbindkeys

For ubuntu users could be helpful:
http://www.atunes.org/wiki/index.php?title=Use_multimedia_keys_with_aTunes_on_Linux