Comment 4 for bug 187249

The magic command 'su ume' is evidently twiddling some bits that cause check-foreground-console to report that the terminal is not in the foreground (like what you get on a distribution like Ubuntu where you can change users without logging out, so applications need to figure out if there is an active session that is valid to display on.)

This is almost certainly not a moblin-media bug, but I'm keeping this open till the real root causes is identified, and then the bug will be updated.