logind: fix Display property of user objects

When we dropped support for creating a per-user to the "main" X11
display we stopped returning useful data in the "Display" user property.
With this change this is fixed and we again expose an appropriate
(graphical session) in the property that is useful as the "main" one, if
one is needed.

1 files changed, 6 insertions, 2 deletions

diff --git a/src/login/logind-session.c b/src/login/logind-session.c
index 4fb229e354..9a54101301 100644
--- a/src/login/logind-session.c
+++ b/src/login/logind-session.c
@@ -545,6 +545,8 @@ int session_start(Session *s) {
 
         s->started = true;
 
+        user_elect_display(s->user);
+
         /* Save data */
         session_save(s);
         user_save(s->user);
@@ -553,7 +555,7 @@ int session_start(Session *s) {
 
         /* Send signals */
         session_send_signal(s, true);
-        user_send_changed(s->user, "Sessions", NULL);
+        user_send_changed(s->user, "Sessions", "Display", NULL);
         if (s->seat) {
                 if (s->seat->active == s)
                         seat_send_changed(s->seat, "Sessions", "ActiveSession", NULL);
@@ -612,6 +614,8 @@ int session_stop(Session *s, bool force) {
 
         s->stopping = true;
 
+        user_elect_display(s->user);
+
         session_save(s);
         user_save(s->user);
 
@@ -660,7 +664,7 @@ int session_finalize(Session *s) {
         }
 
         user_save(s->user);
-        user_send_changed(s->user, "Sessions", NULL);
+        user_send_changed(s->user, "Sessions", "Display", NULL);
 
         return r;
 }