853a854
>    double refresh = 0.0;
857c858,870
<    xmode->VSync_num = (int)(dmode->VRefresh * 1000.0); 
---
> 
>    /* lifted this VRefresh calc from "xf86Mode.c" */
>    if (dmode->VRefresh > 0.0) refresh = dmode->VRefresh;
>    else {
>        if ((dmode->HTotal > 0) && (dmode->VTotal > 0)){
> 	   refresh = dmode->Clock * 1000.0 / (dmode->HTotal * dmode->VTotal);
> 	   if (dmode->Flags & V_INTERLACE) refresh *= 2.0;
> 	   if (dmode->Flags & V_DBLSCAN) refresh /= 2.0;
> 	   if (dmode->VScan > 1) refresh /= (float)(dmode->VScan);
>        }	
>    }
>    xmode->VSync_num = (int)(refresh * 1000.0);
>