Index: nv_hw.c
===================================================================
RCS file: /cvs/xorg/xc/programs/Xserver/hw/xfree86/drivers/nv/nv_hw.c,v
retrieving revision 1.9
diff -u -r1.9 nv_hw.c
--- nv_hw.c	23 Sep 2005 16:25:28 -0000	1.9
+++ nv_hw.c	28 Sep 2005 07:25:23 -0000
@@ -919,7 +919,7 @@
     RIVA_HW_STATE *state
 )
 {
-    int i;
+    int i, j;
 
     pNv->PMC[0x0140/4] = 0x00000000;
     pNv->PMC[0x0200/4] = 0xFFFF00FF;
@@ -1172,6 +1172,10 @@
               pNv->PGRAPH[0x0090/4] = 0x00008000;
               pNv->PGRAPH[0x0610/4] = 0x00be3c5f;
 
+              j = pNv->REGS[0x1540/4] & 0xff;
+              for(i = 0; !(j & 1); j >>= 1, i++);
+              pNv->PGRAPH[0x5000/4] = i;
+
               if((pNv->Chipset & 0xfff0) == 0x0040) {
                  pNv->PGRAPH[0x09b0/4] = 0x83280fff;
                  pNv->PGRAPH[0x09b4/4] = 0x000000a0;