When I hit 'Esc' after adding a part to Schematic Editor, I do not get the 'Add' dialog.
Eagle is doing some kind of check of Linux window managers and not generating a MapNotify, Reparent when it is run under OLVWM. I can manually do xdotool windowmap 0x280004f and force that hidden window to display correctly.
Eagle: Editing a faulty part in 7.2 - how? - Electrical Engineering Stack Exchange and Eagle 7.2.0: "Esc" after "Add" does nothing (I don't get back the Add dialog)
Perhaps there is a if statement in your code that checks all popular Linux WMs and does one thing and then if OLVWM doesn't match that list, you handle it in some other way.. Could you please fix or add my OLVWM window manager to your list of supported Linux Window Managers.