russell@erin:~$ ps ax|grep --color=auto -i Xgl
 6633 ?        S      0:00 /bin/sh /usr/share/xserver-xgl/Xgl-lockfile-wrapper :1 -accel xv:pbuffer -accel glx:pbuffer -nolisten tcp -fullscreen -br +xinerama
 6638 ?        S      0:20 Xgl :1 -accel xv:pbuffer -accel glx:pbuffer -nolisten tcp -fullscreen -br +xinerama
10944 pts/1    R+     0:00 grep --color=auto -i xgl
russell@erin:~$