Can't use fields of material editor under Ubuntu

The gray fileds - under Options as well as Additional RenderState - shown in the screenshot are neither editable nor clickable. Anyone has any idea how to fix it?

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Rhhaaa you linux lovers…
What the fuck can be happening…
@Momoko_Fan could you confirm the issue on linux?
It works fine on windows and osx.

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This is what it looks like for me, Ubuntu 14.04, Jmonkey 3.0.10

This is the source of the Material.

Material Cursor : Common/MatDefs/Misc/Unshaded.j3md {
    MaterialParameters {
        ColorMap : Textures/cursor.png
    AdditionalRenderState {

@Lunarovich are you using 3.0 or 3.1?
@zanval how do things work for you, for both 3.0 and 3.1?

I’m using 3.0. Haven’t tested it with 3.1. I’m using Ubuntu 15.04.

oh that’s 3.0?
That’s even weirder…

I can reproduce this in 3.1-alpha1.
It happens when using the “GTK+” or “Nimbus” LaFs, but not with “Metal”, “Motif” or “DarkMonkey”.
Some LaFs have trouble with how the layout is generated for the material editor, I guess.

Okay, this is where things get wierd.

I’m running Ubuntu 14.04 with Oracle JDK 8 (EDIT: it uses the bundled JDK 7.51)

For me, the 3.0 material editor always looks like in @eashi s screenshot. Tested on GTK, Metal, Motif.

However, the 3.1.0-alpha1 material editor works perfectly fine, regardless of LaF.
Tested with DarkMonkey, GTK, Metal

you sure about that? cause my sdk 3.0 still runs on the bundled 1.7.51.

correction: I forgot about the bundled JDK. It’s running on the bundled JDK 7.51

Uhm isn’t this a question about which jre you are running on as the jdk is only for compiling purposes?
Like maybe this issue is jre related (and that’s why things change for you in 3.1?)

3.0 uses the bundled JDK, but 3.1 uses my default JDK (Oracle JDK 8)

Didn’t know that changed!