--- XFree86-3.3.6/xc/lib/X11/XlibInt.c.fixemacs	Mon Jan 24 17:09:48 2000
+++ XFree86-3.3.6/xc/lib/X11/XlibInt.c	Mon Jan 24 17:10:49 2000
@@ -597,7 +597,10 @@
 	register char *bufindex;
 	_XExtension *ext;
 
-	if (dpy->flags & XlibDisplayIOError) return;
+       if (dpy->flags & XlibDisplayIOError) {
+            dpy->bufptr = dpy->buffer;  /* reset to avoid buffer overflows */
+            return;
+       }
 #ifdef XTHREADS
 	while (dpy->flags & XlibDisplayWriting) {
 	    ConditionWait(dpy, dpy->lock->writers);