Could not switch display mode on Ubuntu Gutsy

[NeTRaY]

Hello ,

I have an odd problem with starting my app on Gutsy Gibbon, standard / fresh install.
I have talked to Matzon on IRC about this the other day and he adviced me to post here...

Could not switch display mode

It happens only when the computer is off for some time, then after a few reboots everything works fine until next turn off... Odd huh? This is the debug output:

etPathFromClassLoader: searching for: openal
getPathFromClassLoader: Path found: /home/gcadmin/.java/deployment/cache/6.0/48/66d7d1b0-14209ea6-n/libopenal.so
getPathFromClassLoader: searching for: lwjgl
getPathFromClassLoader: Path found: /home/gcadmin/.java/deployment/cache/6.0/61/735b167d-6f0d0112-n/liblwjgl.so
getPathFromClassLoader: searching for: lwjgl
getPathFromClassLoader: Path found: /home/gcadmin/.java/deployment/cache/6.0/61/735b167d-6f0d0112-n/liblwjgl.so
Found 25 OpenAL paths
Testing '/home/gcadmin/.java/deployment/cache/6.0/48/66d7d1b0-14209ea6-n/libopenal.so'
Found OpenAL at '/home/gcadmin/.java/deployment/cache/6.0/48/66d7d1b0-14209ea6-n/libopenal.so'
Xrandr extension version 1.2
Using Xrandr for display mode switching
XF86VidMode extension version 2.2
Initial mode: 800 x 600 x 24 @62Hz
Removed 0 duplicate displaymodes
Mode 0: 1280x1024 @50
Mode 1: 1280x1024 @51
Mode 2: 1280x960 @52
Mode 3: 1280x800 @53
Mode 4: 1280x768 @54
Mode 5: 1152x864 @55
Mode 6: 1024x768 @56
Mode 7: 1024x768 @57
Mode 8: 1024x768 @58
Mode 9: 960x600 @59
Mode 10: 840x525 @60
Mode 11: 832x624 @61
Mode 12: 800x600 @62
Mode 13: 800x600 @63
Could not switch mode
Mode 14: 800x600 @64
Mode 15: 800x600 @65
Mode 16: 800x600 @66
Mode 17: 800x600 @67
Mode 18: 800x512 @68
Mode 19: 720x450 @69
Mode 20: 640x512 @70
Mode 21: 640x512 @71
Mode 22: 640x480 @72
Mode 23: 640x480 @73
Mode 24: 640x480 @74
Mode 25: 640x480 @75
Mode 26: 640x400 @76
Mode 27: 640x384 @77
Mode 28: 576x432 @78
Mode 29: 512x384 @79
Mode 30: 512x384 @80
Mode 31: 512x384 @81
Mode 32: 416x312 @82
Mode 33: 400x300 @83
Mode 34: 400x300 @84
Mode 35: 400x300 @85
Mode 36: 400x300 @86
Mode 37: 320x240 @87
Mode 38: 320x240 @88
Mode 39: 320x240 @89
org.lwjgl.LWJGLException: Could not switch mode.
	at org.lwjgl.opengl.LinuxDisplay.nSwitchDisplayMode(Native Method)
	at org.lwjgl.opengl.LinuxDisplay.switchDisplayModeOnTmpDisplay(LinuxDisplay.java:430)
	at org.lwjgl.opengl.LinuxDisplay.switchDisplayMode(LinuxDisplay.java:420)
	at org.lwjgl.opengl.Display.switchDisplayMode(Display.java:302)
	at org.lwjgl.opengl.Display.create(Display.java:753)
	at org.lwjgl.opengl.Display.create(Display.java:709)
	at org.lwjgl.opengl.Display.create(Display.java:691)
	at pl.netray.hype.game.Game.initDisplay(Unknown Source)
	at pl.netray.hype.game.Game.startGame(Unknown Source)
	at gcblackjack.GCBlackJack.<init>(Unknown Source)
	at gcblackjack.GCBlackJack.main(Unknown Source)
	at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
	at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
	at java.lang.reflect.Method.invoke(Method.java:597)
	at com.sun.javaws.Launcher.executeApplication(Launcher.java:1272)
	at com.sun.javaws.Launcher.executeMainClass(Launcher.java:1218)
	at com.sun.javaws.Launcher.doLaunchApp(Launcher.java:1065)
	at com.sun.javaws.Launcher.run(Launcher.java:105)
	at java.lang.Thread.run(Thread.java:619)

I suppose that this has something to do with Xrandr... but I do not know how to cope with this problem on my own...

Thanks.

[Schnitter]

Eh...do you use SUN's Java-Version? Or another one?
(I've no idea what's going on, but I think it could be important^^)

[NeTRaY]

latest sun's j2se6

[NeTRaY]

I have found a solution thanks to guys from IRC (thanks again)

i have to start the game with LWJGL_DISABLE_XRANDR set to true, everything works fine if i set it via command line but for some reason it does not work when starting with java webstart.

i had to set it programmatically