diff -u -b -B -u -r1.68 radeon_cp.c
--- radeon_cp.c	8 Nov 2005 02:38:01 -0000	1.68
+++ radeon_cp.c	15 Dec 2005 12:05:35 -0000
@@ -1503,7 +1503,7 @@
 
 	dev_priv->gart_size = init->gart_size;
 	dev_priv->gart_vm_start = dev_priv->fb_location
-	    + RADEON_READ(RADEON_CONFIG_APER_SIZE);
+	    + RADEON_READ(RADEON_CONFIG_APER_SIZE) * 2;
 
 #if __OS_HAS_AGP
 	if (dev_priv->flags & CHIP_IS_AGP)