--- a/src/video/x11/SDL_x11modes.c Fri Oct 05 22:43:00 2012 -0400
+++ b/src/video/x11/SDL_x11modes.c Sat Oct 06 10:53:47 2012 -0700
@@ -567,7 +567,9 @@
#if SDL_VIDEO_DRIVER_X11_XVIDMODE
if (!displaydata->use_xrandr &&
#if SDL_VIDEO_DRIVER_X11_XINERAMA
- (!displaydata->use_xinerama || displaydata->xinerama_info.screen_number == 0) &&
+ /* XVidMode only works on the screen at the origin */
+ (!displaydata->use_xinerama ||
+ (displaydata->x == 0 && displaydata->y == 0)) &&
#endif
use_vidmode) {
displaydata->use_vidmode = use_vidmode;