1.1 --- a/src/video/x11/SDL_x11gl.c	Tue Sep 29 13:42:33 2009 +0000
     1.2 +++ b/src/video/x11/SDL_x11gl.c	Tue Sep 29 13:50:33 2009 +0000
     1.3 @@ -289,7 +289,9 @@
     1.4  		if ( this->gl_data->glXSwapIntervalMESA ) {
     1.5  			this->gl_data->glXSwapIntervalMESA(this->gl_config.swap_control);
     1.6  		} else if ( this->gl_data->glXSwapIntervalSGI ) {
     1.7 -			this->gl_data->glXSwapIntervalSGI(this->gl_config.swap_control);
     1.8 +			if (this->gl_data->glXSwapIntervalSGI(this->gl_config.swap_control) != 0) {
     1.9 +				this->gl_data->sgi_swap_interval = this->gl_config.swap_control;
    1.10 +			}
    1.11  		}
    1.12  	}
    1.13  #else
    1.14 @@ -412,7 +414,10 @@
    1.15  	    case SDL_GL_SWAP_CONTROL:
    1.16  		if ( this->gl_data->glXGetSwapIntervalMESA ) {
    1.17  			*value = this->gl_data->glXGetSwapIntervalMESA();
    1.18 -			return(0);
    1.19 +			return 0;
    1.20 +		} else if ( this->gl_data->glXSwapIntervalSGI ) {
    1.21 +			*value = this->gl_data->sgi_swap_interval;
    1.22 +			return 0;
    1.23  		} else {
    1.24  			unsupported = 1;
    1.25  		}