Posted by Xerxes Rånby on May 22, 2012; 9:32am
URL: https://forum.jogamp.org/JOGL-not-launching-on-Ubuntu-12-04-LTS-tp4005531p4006328.html

Please install
icedtea-netx and icedtea-plugin
and then run

javaws http://jogamp.org/deployment/jogamp-current/jogl-demos/Gears.jnlp

from a terminal and report any error message.
Running the Gears.jnlp using javaws  should work.