Same error at home under Mandriva Linux 2007 with an ATI Radeon 9250 Pro:
Loading Texture...from Image
Loading Texture...from Image
Tungsten Graphics, Inc.-Mesa DRI R200 20060602 AGP 1x x86/MMX+/3DNow!+/SSE TCL/false/true/true/false
[200]
Loading configuration...
Saving configuration...
....
Starting up SoundSystem...
Initializing OpenAL
(The lwjgl binding of OpenAL. For more information, see
http://www.lwjgl.org)
OpenAL initialized.
Java version is: 1.6.0_07
-> support for BufferedImage
Version helper for 1.2+ initialized!
-> using BufferedImage
Software renderer (OpenGL mode) initialized
Software renderer disposed
Current mode:640 x 480 x 24 @60Hz
[ Mon Sep 22 18:46:04 CEST 2008 ] - WARNING: ZBuffer depth of 24 not supported - trying something else now...!
[ Mon Sep 22 18:46:05 CEST 2008 ] - WARNING: Does this machine actually support OpenGL? Trying everything at lowest settings now!
[ Mon Sep 22 18:46:05 CEST 2008 ] - ERROR: Unable to set any valid videomode on this machine!
[ Mon Sep 22 18:46:05 CEST 2008 ] - ERROR: Can't set videomode - try different settings!
[ Mon Sep 22 18:46:05 CEST 2008 ] - ERROR: java.lang.RuntimeException: [ Mon Sep 22 18:46:05 CEST 2008 ] - ERROR: Can't set videomode - try different settings!
java.lang.RuntimeException: [ Mon Sep 22 18:46:05 CEST 2008 ] - ERROR: java.lang.RuntimeException: [ Mon Sep 22 18:46:05 CEST 2008 ] - ERROR: Can't set videomode - try different settings!
at com.threed.jpct.Logger.log(Unknown Source)
at com.threed.jpct.FrameBuffer.enableRenderer(Unknown Source)
at com.threed.jpct.FrameBuffer.enableRenderer(Unknown Source)
at com.threed.jpct.FrameBuffer.enableRenderer(Unknown Source)
at robombs.game.BlueThunderClient.initBuffer(BlueThunderClient.java:863)
at robombs.game.BlueThunderClient.run(BlueThunderClient.java:473)
at robombs.game.BlueThunderClient.selected(BlueThunderClient.java:138)
at robombs.game.startup.ResolutionFrame$1$1.run(ResolutionFrame.java:25)
I don't understand why it doesn't work. The demos of JPCT work on my computer, almost all games using LWJGL, GL4J and JOGL work here, I'm really surprised.