changing GDM background image on F12

[fred smith]

Hi!

I've looked thru the forums and done some googling but I don't see an 
answer THAT WORKS for this question:

How to change the default GDM background/wallpaper to some other image?
I've tried all the things listed in the forums and none of them works,
including (but not limited to) copying the image I want into 
/usr/share/backgrounds/images then running this command:

gconftool-2 --direct --config-source=xml:readwrite:/etc/gconf/gconf.xml.defaults --set --type string "/desktop/gnome/background/picture_filename" "/usr/share/backgrounds/images/Fistmaster.FullHD.0190.jpg"

having done that either log off or reboot and voila! no change at all! :(

Thanks in advance.

-- 
---- Fred Smith -- fredex at fcshome.stoneham.ma.us ------------------------ ----
                    Do you not know? Have you not heard? 
    The LORD is the everlasting God, the Creator of the ends of the earth. 
  He will not grow tired or weary, and his understanding no one can fathom.
----------------------------- Isaiah 40:28 (niv) -----------------------------