Patch to force pixmaps to be allocated in host memory.  Work in
progress, will eventually allow the xserver to keep pixmaps in video
memory until the root window is redirected.  At that point pixmaps are
evicted to host memory and subsequent pixmap allocations are done in
host memory.

--- ./hw/xfree86/xaa/xaaInitAccel.c.no-offscreen-pixmaps	2006-08-07 14:21:11.000000000 -0400
+++ ./hw/xfree86/xaa/xaaInitAccel.c	2006-08-07 14:20:44.000000000 -0400
@@ -92,7 +92,7 @@
     {XAAOPT_PIXMAP_CACHE,		"XaaNoPixmapCache",
 				OPTV_BOOLEAN,	{0}, FALSE },
     {XAAOPT_OFFSCREEN_PIXMAPS,		"XaaNoOffscreenPixmaps",
-				OPTV_BOOLEAN,	{0}, FALSE },
+				OPTV_BOOLEAN,	{0}, TRUE },
     { -1,				NULL,
 				OPTV_NONE,	{0}, FALSE }
 };