I am using the latest version of JMP Beta as well as 64-bit Ubuntu 11.04 using Gnome classic. My graphics card currently is a ATI RV370 (its a loaner until I get a new nvidia card).
Versions reported by JMP
Product Version: jMonkeyEngine SDK 3.0beta
Java: 1.6.0_26; Java HotSpot(TM) 64-Bit Server VM 20.1-b02
System: Linux version 2.6.38-13-generic running on amd64; UTF-8; en_NZ (jmonkeyplatform)
My Problem: JMP randomly crashes. If I launch an application I work on, when I exist the application, the entire desktop freezes. Meaning, the desktop stops accepting keyboard and mouse input. I have to reboot the computer to recover.
Maybe try changing the look and feel using the --laf command line option? If the desktop also fails in combination with this I guess its something like that.
Edit: Also do you have the OpenGL window open when that happens?
What is the --laf? I've tried it but get the following output:
UI class name expected, using default UI...
Also, I don't have any OpenGL windows open when it crashes.