problems on linux

[William Denniss]

Hi I've got the latest package off lwjgl.org (the unofficial one) wanting to try out Xith3D on LWJGL.

Alas I get a native crash when it tries to open a window.

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java org.lwjgl.test.WindowCreationTest Found 4 display modes   Unexpected Signal : 11 occurred at PC=0x401E68F6 Function=(null)+0x401E68F6 Library=/usr/java/j2sdk1.4.2_03/jre/lib/i386/client/libjvm.so   NOTE: We are unable to locate the function name symbol for the error       just occurred. Please refer to release documentation for possible       reason and solutions.     Current Java thread:         at org.lwjgl.opengl.Window.nCreate(Native Method)         at org.lwjgl.opengl.Window.createWindow(Window.java:313)         at org.lwjgl.opengl.Window.create(Window.java:291)         at org.lwjgl.test.WindowCreationTest.main(WindowCreationTest.java:58)   Dynamic libraries:

When I run the tests, I get this message:

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java org.lwjgl.test.DisplayTest ==== Test Current ==== Info about current: Platform: GLX Graphics card: null, version: null Resolution: 1024x768x16@0Hz ---- Test Current ---- ==== Test query ==== Retrieving available displaymodes Found 4 modes The first 5 are: 800 x 600 x 16 @0Hz 512 x 384 x 16 @0Hz 640 x 480 x 16 @0Hz 1024 x 768 x 16 @0Hz ---- Test query ---- ==== Test setDisplayMode ==== Retrieving available displaymodes Looking for 640x480x16@60...error FATAL: Unable to find basic mode.

What does that mean and how do I fix it?

The native dump really shouldn't happen anyway should it, is that a bug?

I am running Red Hat 9, on a laptop with software gl rendering (Mesa).  Xith3D and JOGL work fine (almost all demos will run, if a little slow).

Thanks in advance,

Will.

[Matzon]

LWJGL doesn't allow software modes, since it doesn't make sense in a gaming library. However we provide a hidden preference to allow software mode for developers working in software mode. Just set the property org.lwjgl.opengl.Window.allowSoftwareOpenGL to true, typically by passing:
-Dorg.lwjgl.opengl.Window.allowSoftwareOpenGL=true on the command line. I do however believe you will need the latest from cvs for that to work.

[elias]

And the native crash you saw has been fixed in CVS already :-) It had something to do with me throwing multiple exceptions on one native call.

- elias

Games published by our own members! Check 'em out!

[vrm]

And the native crash you saw has been fixed in CVS already :-) It had something to do with me throwing multiple exceptions on one native call.

- elias

evil JNI

[William Denniss]

Thanks for the info.

Now for my other test machine: GeForce2MX 400, Linux (Fedora 1) most things work except for the "Grass" demo:

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java org.lwjgl.test.opengl.Grass Display mode: 640 x 480 x 24 @0Hz Created display. Created OpenGL. Vertex program supported: true java.io.IOException: Stream closed         at java.io.BufferedInputStream.ensureOpen(BufferedInputStream.java:120)         at java.io.BufferedInputStream.read(BufferedInputStream.java:199)         at org.lwjgl.test.opengl.Grass.loadFile(Grass.java:126)         at org.lwjgl.test.opengl.Grass.main(Grass.java:149) Exception in thread "main" java.lang.NullPointerException         at org.lwjgl.test.opengl.Grass.main(Grass.java:150)

any idea why?

Cheers,

Will.

[elias]

It needs a file (the vertex shader) from the res/ directory, try adding that to the classpath.

- elias

[Matzon]

actually it's in /src/java/org/lwjgl/test/opengl/ - so including /src/java in the classpath will do?

[William Denniss]

ta

Will.