--- modules/pam_xauth/pam_xauth.c	8 Apr 2008 07:01:41 -0000	1.16
+++ modules/pam_xauth/pam_xauth.c	18 Nov 2008 12:30:58 -0000
@@ -280,7 +280,7 @@
 			return noent_code;
 		default:
 			if (debug) {
-				pam_syslog(pamh, LOG_ERR,
+				pam_syslog(pamh, LOG_DEBUG,
 					   "error opening %s: %m", path);
 			}
 			return PAM_PERM_DENIED;
@@ -293,7 +293,8 @@
 		     int argc, const char **argv)
 {
 	char *cookiefile = NULL, *xauthority = NULL,
-	     *cookie = NULL, *display = NULL, *tmp = NULL;
+	     *cookie = NULL, *display = NULL, *tmp = NULL,
+	     *xauthlocalhostname = NULL;
 	const char *user, *xauth = NULL;
 	struct passwd *tpwd, *rpwd;
 	int fd, i, debug = 0;
@@ -588,14 +589,30 @@
 
 		  if (asprintf(&d, "DISPLAY=%s", display) < 0)
 		    {
-		      pam_syslog(pamh, LOG_DEBUG, "out of memory");
+		      pam_syslog(pamh, LOG_ERR, "out of memory");
 		      cookiefile = NULL;
 		      retval = PAM_SESSION_ERR;
 		      goto cleanup;
 		    }
 
 		  if (pam_putenv (pamh, d) != PAM_SUCCESS)
-		    pam_syslog (pamh, LOG_DEBUG,
+		    pam_syslog (pamh, LOG_ERR,
+				"can't set environment variable '%s'", d);
+		  free (d);
+		}
+
+		/* set XAUTHLOCALHOSTNAME to make sure that su - work under gnome */
+		if ((xauthlocalhostname = getenv("XAUTHLOCALHOSTNAME")) != NULL) {
+		  char *d;
+
+		  if (asprintf(&d, "XAUTHLOCALHOSTNAME=%s", xauthlocalhostname) < 0) {
+		    pam_syslog(pamh, LOG_ERR, "out of memory");
+		    retval = PAM_SESSION_ERR;
+		    goto cleanup;
+		  }
+
+		  if (pam_putenv (pamh, d) != PAM_SUCCESS)
+		    pam_syslog (pamh, LOG_ERR,
 				"can't set environment variable '%s'", d);
 		  free (d);
 		}