Java-FX 11. Missing toolkit? Error initializing QuantumRenderer

[Andrew Munn]

I'm using x2go to connect to a session running the Mate window manager and 
seein this error.  Could it be related to a missing jfxrt.jar?  I don't 
see that jar under /opt/javafx-sdk-11

I'm starting my application with these:

--add-opens javafx.fxml/javafx.fxml=ALL-UNNAMED"
--illegal-access=permit"
--module-path /opt/javafx-sdk-11/lib"
--add-modules=javafx.controls,javafx.fxml,javafx.web,javafx.swing"
--add-exports=javafx.base/com.sun.javafx.beans=ALL-UNNAMED"
--add-exports=javafx.base/com.sun.javafx.reflect=ALL-UNNAMED"
--add-exports=javafx.graphics/com.sun.javafx.util=ALL-UNNAMED"
--add-exports=javafx.graphics/com.sun.glass.utils=ALL-UNNAMED"
--add-exports=javafx.graphics/com.sun.javafx.tk=ALL-UNNAMED"
-Djdk.gtk.version=2"  (worth a try?)
-Dprism.verbose=true"
## add to classpath:
CP=$CP:/opt/javafx-sdk-11/lib/*


I'm not using the console but in case it matters, the video hardware is:
# dmesg|grep g200
[    5.129761] mgag200 0000:01:04.0: fb0: mgadrmfb frame buffer device
[    5.224550] [drm] Initialized mgag200 1.0.0 20110418 for 0000:01:04.0 on minor 0


java version "11" 2018-09-25
Java(TM) SE Runtime Environment 18.9 (build 11+28)
Java HotSpot(TM) 64-Bit Server VM 18.9 (build 11+28, mixed mode)
Prism pipeline init order: es2 sw
Using Double Precision Marlin Rasterizer
Using dirty region optimizations
Not using texture mask for primitives
Not forcing power of 2 sizes for textures
Using hardware CLAMP_TO_ZERO mode
Opting in for HiDPI pixel scaling
Prism pipeline name = com.sun.prism.es2.ES2Pipeline
GraphicsPipeline.createPipeline failed for com.sun.prism.es2.ES2Pipeline
java.lang.ClassNotFoundException: com.sun.prism.es2.ES2Pipeline
        at 
java.base/jdk.internal.loader.BuiltinClassLoader.loadClass(BuiltinClassLoader.java:582)
        at 
java.base/jdk.internal.loader.ClassLoaders$AppClassLoader.loadClass(ClassLoaders.java:178)
        at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:521)
        at java.base/java.lang.Class.forName0(Native Method)
        at java.base/java.lang.Class.forName(Class.java:315)
        at 
javafx.graphics/com.sun.prism.GraphicsPipeline.createPipeline(GraphicsPipeline.java:187)
        at 
javafx.graphics/com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.init(QuantumRenderer.java:91)
        at 
javafx.graphics/com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:124)
        at java.base/java.lang.Thread.run(Thread.java:834)
*** Fallback to Prism SW pipeline
Prism pipeline name = com.sun.prism.sw.SWPipeline
GraphicsPipeline.createPipeline failed for com.sun.prism.sw.SWPipeline
java.lang.UnsatisfiedLinkError: no prism_sw in java.library.path: [., 
/usr/java/packages/lib, /usr/lib64, /lib64, /lib, /usr/lib]
        at 
java.base/java.lang.ClassLoader.loadLibrary(ClassLoader.java:2660)
        at java.base/java.lang.Runtime.loadLibrary0(Runtime.java:829)
        at java.base/java.lang.System.loadLibrary(System.java:1867)
        at 
javafx.graphics/com.sun.glass.utils.NativeLibLoader.loadLibraryInternal(NativeLibLoader.java:150)
        at 
javafx.graphics/com.sun.glass.utils.NativeLibLoader.loadLibrary(NativeLibLoader.java:52)
        at 
javafx.graphics/com.sun.prism.sw.SWPipeline.lambda$static$0(SWPipeline.java:42)
        at java.base/java.security.AccessController.doPrivileged(Native 
Method)
        at 
javafx.graphics/com.sun.prism.sw.SWPipeline.<clinit>(SWPipeline.java:41)
        at java.base/java.lang.Class.forName0(Native Method)
        at java.base/java.lang.Class.forName(Class.java:315)
        at 
javafx.graphics/com.sun.prism.GraphicsPipeline.createPipeline(GraphicsPipeline.java:187)
        at 
javafx.graphics/com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.init(QuantumRenderer.java:91)
        at 
javafx.graphics/com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:124)
        at java.base/java.lang.Thread.run(Thread.java:834)
Graphics Device initialization failed for :  es2, sw
Error initializing QuantumRenderer: no suitable pipeline found
java.lang.RuntimeException: java.lang.RuntimeException: Error initializing 
QuantumRenderer: no suitable pipeline found
        at 
javafx.graphics/com.sun.javafx.tk.quantum.QuantumRenderer.getInstance(QuantumRenderer.java:280)
        at 
javafx.graphics/com.sun.javafx.tk.quantum.QuantumToolkit.init(QuantumToolkit.java:222)
        at 
javafx.graphics/com.sun.javafx.tk.Toolkit.getToolkit(Toolkit.java:260)
        at 
javafx.graphics/com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:267)
        at 
javafx.graphics/com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:158)
        at 
javafx.graphics/com.sun.javafx.application.LauncherImpl.startToolkit(LauncherImpl.java:658)
        at 
javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:409)
        at 
javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:363)
        at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native 
Method)
        at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at 
java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:1051)
Caused by: java.lang.RuntimeException: Error initializing QuantumRenderer: 
no suitable pipeline found
        at 
javafx.graphics/com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.init(QuantumRenderer.java:94)
        at 
javafx.graphics/com.sun.javafx.tk.quantum.QuantumRenderer$PipelineRunnable.run(QuantumRenderer.java:124)
        at java.base/java.lang.Thread.run(Thread.java:834)
Exception in thread "main" java.lang.reflect.InvocationTargetException
        at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native 
Method)
        at 
java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
        at 
java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
        at java.base/java.lang.reflect.Method.invoke(Method.java:566)
        at 
java.base/sun.launcher.LauncherHelper$FXHelper.main(LauncherHelper.java:1051)
Caused by: java.lang.RuntimeException: No toolkit found
        at 
javafx.graphics/com.sun.javafx.tk.Toolkit.getToolkit(Toolkit.java:272)
        at 
javafx.graphics/com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:267)
        at 
javafx.graphics/com.sun.javafx.application.PlatformImpl.startup(PlatformImpl.java:158)
        at 
javafx.graphics/com.sun.javafx.application.LauncherImpl.startToolkit(LauncherImpl.java:658)
        at 
javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:409)
        at 
javafx.graphics/com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:363)