[SDL] Ugly patch for nasty crash with certain Linux OpenGL driver

[Elmar Krieger]

Hi SDLers,

I got reproducible crashes in XCloseDisplay called from X11_VideoQuit 
upon the second call to SDL_SetVideoMode (first time worked without 
problems).

Closer inspection showed that the problem was reopening the second 
display connection GFX_Display. Video drivers with 'Tungsten' in the 
OpenGL vendor string (e.g. Intel integrated chipsets, Radeon 7000) then 
crashed.

The brute-force hack is to keep the GFX_Display connection open:


 >In src/video/x11/SDL_x11video.c

 >replace
	GFX_Display = XOpenDisplay(display);
 >with
         if (!GFX_Display) GFX_Display = XOpenDisplay(display);

 >delete
		/* Close the X11 graphics connection */
		if ( GFX_Display != NULL ) {
			XCloseDisplay(GFX_Display);
			GFX_Display = NULL;
		}


Apologies that I don't have a minimal case example at hand, but I hope 
the above is enough for insiders to know what goes wrong and come up 
with a proper 'clean' fix... ;-)

CU,
Elmar

-- 
Elmar Krieger, PhD
YASARA Biosciences & CMBI Outstation Austria
Neue-Welt-Hoehe 13/b
A-8042 Graz
Austria/Europe

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