Axazeano Axazeano - 1 month ago 4x
Java Question

Mouse doesn't work during debugging JavaFX projects in idea is running on KDE 5

When I am debugging JavaFX project and debugging process stops on a breakpoint i can't use a mouse. I can move the cursor on the screen, but left, right buttons and wheel don't work. More than, the mouse doesn't work system-wild: if I switch an active window the mouse won't work in this window too. Keyboard works well.

I use:

  • IntelliJ IDEA 2016.2.3

  • Build #IU-162.1812.17, built on August 30, 2016

  • JRE: 1.8.0_112-release-b287 amd64

  • JVM: OpenJDK 64-Bit Server VM by JetBrains s.r.o

  • KDE Plasma 5.5.1

  • QT 5.5.1

  • Kernel

→ java -version

java version "1.8.0_101"
Java(TM) SE Runtime Environment (build 1.8.0_101-b13)
Java HotSpot(TM) 64-Bit Server VM (build 25.101-b13, mixed mode)

Also, this issue appeared on other DEs (xfce) and different hardware (on my laptop).


A solution is listed here:

To use this in IntelliJ - Go to Run -> Edit Configurations, and add:


to VM Options.

Edit: Heads up - this messes with Drag/Drop events, possibly causing them to not work or work unexpectedly. If you are implementing drag/drop this solution is problematic.