--- ./src/ui/ui-drv/x11/xlib.c.gege	2003-04-10 22:06:21.000000000 +0200
+++ ./src/ui/ui-drv/x11/xlib.c	2003-04-10 22:20:26.000000000 +0200
@@ -97,6 +97,18 @@
 }
 
 #ifdef MITSHM
+// Trap SHM errors
+static Bool shm_error = False;
+static int (*old_error_handler)(Display *, XErrorEvent *);
+
+static int error_handler(Display *d, XErrorEvent *e)
+{
+	if (e->error_code == BadAccess) {
+		shm_error = True;
+		return 0;
+	} else
+		return old_error_handler(d, e);
+}
 int
 alloc_shm_image (xdisplay * new)
 {
@@ -155,10 +167,15 @@
 			(char *) new->image[i]->data;
 		      new->xshminfo[i].readOnly = True;
 
+		      /* Try to attach SHM image, catching errors */
+		      shm_error = False;
+		      old_error_handler = XSetErrorHandler(error_handler);
+
 		      new->SharedMemFlag =
 			XShmAttach (new->display, &new->xshminfo[i]);
 		      XSync (new->display, False);
-		      if (!new->SharedMemFlag)
+		      XSetErrorHandler(old_error_handler);
+		      if (!new->SharedMemFlag || shm_error)
 			{
 			  XDestroyImage (new->image[i]);
 			  new->image[i] = (XImage *) NULL;