MATLAB R2014a command window doesn't accept input on Ubuntu 14.04

Hello,

I am running R2014a on Ubuntu 14.04. The MATLAB is freshly installed, but Ubuntu is an upgrade from 12.04 (which was upgraded from 10.04 before that). I am running Ubuntu Server, so I'm using X-11 forwarding to enable display on my Windows 7 machine.

I have a problem when I minimize and restore the MATLAB window that the Command Window no longer accepts input. This seems very similar to a problem that was reported for the Mac last year: http://www.mathworks.com/matlabcentral/answers/79581-cannot-type-or-edit-in-matlab-only-right-click-and-menus

The default version of Java that MATLAB uses is

>> version -java
ans =
Java 1.7.0_11-b21 with Oracle Corporation Java HotSpot(TM) 64-Bit Server VM mixed mode

If I start MATLAB and set the MATLAB_JAVA environment variable to the OpenJDK 7 JRE that is separately installed on my Ubuntu machine, I have no such problem and the Java version is reported properly:

>> version -java
ans =
Java 1.7.0_65-b32 with Oracle Corporation OpenJDK 64-Bit Server VM mixed mode

How can I fix this issue without having to set the MATLAB_JAVA environment variable for all of my users?

Thanks, Bryan