Create a 2D window and then manually focus a different window on your desktop, call SDL_PumpEvents() so the X11 driver sets its this->hidden->switch_waiting, then set a fullscreen OpenGL window (which makes the X11 driver tear down and create a new window instead of just resizing the existing one), poll for events, and the newly-created window will think it needs to pop back to a window. Fixed by resetting switch_waiting to zero if X11_CreateWindow() had to tear down a previous window.

## Makefile.am for SDL using the DGA 2.0 video driver

noinst_LTLIBRARIES = libvideo_dga.la
libvideo_dga_la_SOURCES = $(DGA_SRCS)

# The SDL DGA 2.0 video driver sources
DGA_SRCS = 			\
	SDL_dgaevents.c		\
	SDL_dgaevents_c.h	\
	SDL_dgamouse.c		\
	SDL_dgamouse_c.h	\
	SDL_dgavideo.c		\
	SDL_dgavideo.h