[X2Go-User] Matlab in X2go

[Ulrich Sibiller]

https://stackoverflow.com/questions/34188495/how-can-i-work-around-the-classcastexception-in-java2d-bug-id-7172749
describes that problem and offers a workaround (JVM option
-Dsun.java2d.xrender=false)
Unfortunately that workaround is bad for the x2go environment and will
probably slow down your desktop. Normally we recommend to do the
opposite and ENABLE xrender rendering because then the functions that
NX can accellerate are used.

Uli
On Tue, Oct 23, 2018 at 12:57 AM Thackeray, Neil L <neilt at illinois.edu> wrote:
>
> I’m having some issues using Matlab2018a in X2go. When using xfce4 (and KDE) desktop it causes some exception when the X2go window is hidden or resized. It also will hide all of the button widgets in Matlab until I mouse over them.
>
>
>
> When I change the session type to ‘Single Application: Terminal’, and then typing ‘matlab &’ in the terminal it works perfectly fine.
>
>
>
> This is the exception that Matlab throws, usually many times:
>
>
>
> Exception in thread "AWT-EventQueue-0": java.lang.ClassCastException: sun.awt.image.BufImgSurfaceData cannot be cast to sun.java2d.xr.XRSurfaceData
>
>                 at sun.java2d.xr.XRPMBlitLoops.cacheToTmpSurface(XRPMBlitLoops.java:148)
>
>                 at sun.java2d.xr.XrSwToPMBlit.Blit(XRPMBlitLoops.java:356)
>
>                 at sun.java2d.pipe.DrawImage.blitSurfaceData(DrawImage.java:959)
>
>                 at sun.java2d.pipe.DrawImage.renderImageCopy(DrawImage.java:577)
>
>                 at sun.java2d.pipe.DrawImage.copyImage(DrawImage.java:67)
>
>                 at sun.java2d.pipe.DrawImage.copyImage(DrawImage.java:1014)
>
>                 at sun.java2d.pipe.ValidatePipe.copyImage(ValidatePipe.java:186)
>
>                 at sun.java2d.SunGraphics2D.drawImage(SunGraphics2D.java:3318)
>
>                 at sun.java2d.SunGraphics2D.drawImage(SunGraphics2D.java:3296)
>
>                 at javax.swing.ImageIcon.paintIcon(ImageIcon.java:425)
>
>                 at com.mathworks.toolstrip.plaf.GalleryButtonUI.paintContent(GalleryButtonUI.java:115)
>
>                 at com.mathworks.toolstrip.plaf.RegularButtonUI.paintContent(RegularButtonUI.java:65)
>
>                 at com.mathworks.toolstrip.plaf.ToolstripButtonUI.paint(ToolstripButtonUI.java:198)
>
>                 at javax.swing.plaf.ComponentUI.update(ComponentUI.java:161)
>
>                 at javax.swing.JComponent.paintComponent(JComponent.java:780)
>
>                 at com.mathworks.mwswing.MJButton.paintComponent(MJButton.java:432)
>
>                 at javax.swing.JComponent.paint(JComponent.java:1056)
>
>                 at com.mathworks.mwswing.MJButton.paint(MJButton.java:410)
>
>                 at javax.swing.JComponent.paintChildren(JComponent.java:889)
>
>                 at javax.swing.JComponent.paint(JComponent.java:1065)
>
>                 at javax.swing.JComponent.paintChildren(JComponent.java:889)
>
>                 at javax.swing.JComponent.paint(JComponent.java:1065)
>
>                 at javax.swing.JComponent.paintChildren(JComponent.java:889)
>
>                 at javax.swing.JComponent.paint(JComponent.java:1065)
>
>                 at javax.swing.JComponent.paintChildren(JComponent.java:889)
>
>                 at javax.swing.JComponent.paint(JComponent.java:1065)
>
>                 at javax.swing.JComponent.paintToOffscreen(JComponent.java:5210)
>
>                 at javax.swing.RepaintManager$PaintManager.paintDoubleBuffered(RepaintManager.java:1579)
>
>                 at javax.swing.RepaintManager$PaintManager.paint(RepaintManager.java:1502)
>
>                 at javax.swing.BufferStrategyPaintManager.paint(BufferStrategyPaintManager.java:306)
>
>                 at javax.swing.RepaintManager.paint(RepaintManager.java:1272)
>
>                 at javax.swing.JComponent._paintImmediately(JComponent.java:5158)
>
>                 at javax.swing.JComponent.paintImmediately(JComponent.java:4969)
>
>                 at javax.swing.RepaintManager$4.run(RepaintManager.java:831)
>
>                 at javax.swing.RepaintManager$4.run(RepaintManager.java:814)
>
>                 at java.security.AccessController.doPrivileged(Native Method)
>
>                 at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
>
>                 at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:814)
>
>                 at javax.swing.RepaintManager.paintDirtyRegions(RepaintManager.java:789)
>
>                 at javax.swing.RepaintManager.prePaintDirtyRegions(RepaintManager.java:738)
>
>                 at javax.swing.RepaintManager.access$1200(RepaintManager.java:64)
>
>                 at javax.swing.RepaintManager$ProcessingRunnable.run(RepaintManager.java:1732)
>
>                 at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
>
>                 at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
>
>                 at java.awt.EventQueue.access$500(EventQueue.java:97)
>
>                 at java.awt.EventQueue$3.run(EventQueue.java:709)
>
>                 at java.awt.EventQueue$3.run(EventQueue.java:703)
>
>                 at java.security.AccessController.doPrivileged(Native Method)
>
>                 at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
>
>                 at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
>
>                 at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
>
>                 at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
>
>                 at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
>
>                 at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
>
>                 at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
>
>                 at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
>
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