--- exa_classic.c.orig	2010-06-08 10:17:24.362256614 -0700
+++ exa_classic.c	2010-06-08 10:22:07.905927052 -0700
@@ -256,9 +256,10 @@
     Bool ret;
 
     if (pExaScr->info->PixmapIsOffscreen) {
+	void* old_ptr = pPixmap->devPrivate.ptr;
 	pPixmap->devPrivate.ptr = ExaGetPixmapAddress(pPixmap);
 	ret = pExaScr->info->PixmapIsOffscreen(pPixmap);
-	pPixmap->devPrivate.ptr = NULL;
+	pPixmap->devPrivate.ptr = old_ptr;
     } else
 	ret = (pExaPixmap->offscreen && pExaPixmap->fb_ptr);