For years, DragSource.isDragImageSupported() has returned false on Windows and Linux. Bug ID: 4874070 invoking DragSource's startDrag with an Image renders no image on drag says that this was finally fixed in 2010 in Java 7 build 84. I'm not sure how OpenJDK builds correspond to Oracle builds, but it certainly doesn't seem to be fixed in the latest openjdk-7 in the Ubuntu 12.04 LTS repo.

Can this feature be enabled by some environment or command line option, or is it simply hard-coded in each JDK build?