I am using IDL on Linux Fedora 23. Whenever I try to draw a Graphics Object Display, the IDLgrView object (i.e. the canvas containing the plot/image or whatever...) appears in the foreground of my display and does not go away. If I minimize the window, the window (along with the toolbar) will effectively minimize, but the canvas will remain. If I drag another window towards it, the said window will be under the canvas. The only way to get rid of it is to close the window altogether.

This happens even using the simplest possible code:

oWindow = OBJ_NEW('IDLgrWindow')
oView = OBJ_NEW('IDLgrView')
OWindow->Draw, oView

Any help would be welcome.