org.lwjgl.opengl.awt.AWTTest fails on XWayland

[wolfseifert]

org.lwjgl.opengl.awt.AWTTest fails at runtime on XWayland, it works on X11 and Windows. It used to work on XWayland for older versions (see attached build.gradle.kts).

Steps to reproduce:

• Unzip test.zip
• Run gradle

$ gradle run
> Task :compileJava
> Task :processResources NO-SOURCE
> Task :classes

> Task :run
Exception in thread "AWT-EventQueue-0" java.lang.IllegalStateException: Failed to query GLX version
        at org.lwjgl.opengl.GL.createCapabilitiesGLX(GL.java:693)
        at org.lwjgl.opengl.GL.initCapabilitiesGLX(GL.java:326)
        at org.lwjgl.opengl.GL.getCapabilitiesGLXClient(GL.java:304)
        at org.lwjgl.opengl.GLX13.nglXChooseFBConfig(GLX13.java:131)
        at org.lwjgl.opengl.GLX13.glXChooseFBConfig(GLX13.java:154)
        at org.lwjgl.opengl.awt.PlatformLinuxGLCanvas.create(PlatformLinuxGLCanvas.java:65)
        at org.lwjgl.opengl.awt.PlatformLinuxGLCanvas.create(PlatformLinuxGLCanvas.java:121)
        at org.lwjgl.opengl.awt.AWTGLCanvas.beforeRender(AWTGLCanvas.java:79)
        at org.lwjgl.opengl.awt.AWTGLCanvas.render(AWTGLCanvas.java:120)
        at org.lwjgl.opengl.awt.AWTTest$2.run(AWTTest.java:59)
        at java.desktop/java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:318)
        at java.desktop/java.awt.EventQueue.dispatchEventImpl(EventQueue.java:773)
        at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:720)
        at java.desktop/java.awt.EventQueue$4.run(EventQueue.java:714)
        at java.base/java.security.AccessController.doPrivileged(AccessController.java:400)
        at java.base/java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:87)
        at java.desktop/java.awt.EventQueue.dispatchEvent(EventQueue.java:742)
        at java.desktop/java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:203)
        at java.desktop/java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:124)
        at java.desktop/java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:113)
        at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:109)
        at java.desktop/java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
        at java.desktop/java.awt.EventDispatchThread.run(EventDispatchThread.java:90)

The window shows up, but is empty.

[JNightRider]

Hi @wolfseifert

In version 3.3.4+ of lwjgl3 something curious happens, when it detects wayland it automatically loads EGL and not GLX (this is fine since waylandan is not compatible with GLX unless we use XWaylando as a bridge which is great), this configuration is active by default, but we can force lwjgl3 to use the X11 API as follows (a little trick).

Before any call to GL, you must configure which backend to use:

Configuration.OPENGL_CONTEXT_API.set("native");

[wolfseifert]

Thanks, it works now on XWayland, X11 and Windows. Here is the updated test.zip.

I see this as a workaround, not a fix and therefore keep the issue open.

[JNightRider]

There is a possible solution for this (I opened a PR to solve this problem without having to configure the backend manually).