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diff -up util-linux-2.23.2/login-utils/su-common.c.kzak util-linux-2.23.2/login-utils/su-common.c
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--- util-linux-2.23.2/login-utils/su-common.c.kzak	2013-07-30 10:39:26.223738407 +0200
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+++ util-linux-2.23.2/login-utils/su-common.c	2013-09-09 09:32:05.497238691 +0200
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@@ -111,6 +111,9 @@ static int same_session = 0;
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 /* SU_MODE_{RUNUSER,SU} */
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 static int su_mode;
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+/* Don't print PAM info messages (Last login, etc.). */
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+static int suppress_pam_info;
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+
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 static bool _pam_session_opened;
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 static bool _pam_cred_established;
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 static sig_atomic_t volatile caught_signal = false;
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@@ -208,10 +211,23 @@ static void log_btmp(struct passwd const
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	updwtmp(_PATH_BTMP, &ut);
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 }
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+
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+static int su_pam_conv(int num_msg, const struct pam_message **msg,
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+                       struct pam_response **resp, void *appdata_ptr)
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+{
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+	if (suppress_pam_info
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+	    && num_msg == 1
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+	    && msg
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+	    && msg[0]->msg_style == PAM_TEXT_INFO)
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+		return PAM_SUCCESS;
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+
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+	return misc_conv(num_msg, msg, resp, appdata_ptr);
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+}
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+
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 static struct pam_conv conv =
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 {
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-  misc_conv,
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-  NULL
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+	su_pam_conv,
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+	NULL
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 };
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 static void
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@@ -902,6 +918,9 @@ su_main (int argc, char **argv, int mode
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   init_groups (pw, groups, num_supp_groups);
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+  if (!simulate_login || command)
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+    suppress_pam_info = 1;		/* don't print PAM info messages */
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+
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   create_watching_parent ();
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   /* Now we're in the child.  */