--- seahorse-ssh-askpass.sh.orig	2011-12-07 19:43:58.000000000 +0900
+++ seahorse-ssh-askpass.sh	2011-12-07 19:54:08.000000000 +0900
@@ -1,3 +1,3 @@
-if [ -z "$SSH_ASKPASS" ]; then
+if [ -z "$SSH_ASKPASS" -a -n "$DISPLAY" ]; then
   export SSH_ASKPASS=/usr/lib/seahorse/seahorse-ssh-askpass
 fi