Running jdk9 b132, I'm observing the following issue in javax/swing/JInternalFrame/8146321/JInternalFrameIconTest.java test. The test basically paints an JInternalFrame twice for Metal and Nimbus LaFs, 4 times in total.
Now, on a dual screen machines -- and I have two, with different graphics cards, both booted into Ubuntu 16.04 -- all rounds but the first one give us an empty frame.
There's setLookAndFeel() but no recommended SwingUtilities.updateComponentTreeUI(frame) nor pack() -- but on yet another system with a single monitor and Xfce4, all is painted properly.
I don't know where there's an issue. Is the dual screen setup important? Or any 16.04 Unity behave like this?

RULE "javax/swing/JInternalFrame/8146321/JInternalFrameIconTest.java" Exception java.lang.RuntimeException: Error Log: [javax.swing.plaf.metal.MetalLookAndFeel] : ERROR: icon and imageIcon not same.