Full screen issue after resolution change

[tanertas]

I just checked other fullscreen related issues but it seems that the one I'm experiencing is different.

Groovymame/Switchres is a port of MAME emulator/tool which is capable of dynamically change the screen resolution according to the game's resolution and refresh rate. When I launch groovymame in JWM, screen resolution changes successfully but, screen virtually preserves its previous (desktop) dimensions (Width*Height) thus, only a small portion of picture becomes visible from viewport of top-left corner if the new resolution is smaller than previous (which is the most case).

I tested the fluxbox and i3 and they handle the situation properly. I think that there is an issue related with jwm and resolution changes in fullscreen.