4 files changed, 58 insertions, 36 deletions

diff --git a/src/login/71-seat.rules.in b/src/login/71-seat.rules.in
index ad26acbbb3..ab7b66f651 100644
--- a/src/login/71-seat.rules.in
+++ b/src/login/71-seat.rules.in
@@ -11,6 +11,7 @@ TAG=="uaccess", SUBSYSTEM!="sound", TAG+="seat"
 SUBSYSTEM=="sound", KERNEL=="card*", TAG+="seat"
 SUBSYSTEM=="input", KERNEL=="input*", TAG+="seat"
 SUBSYSTEM=="graphics", KERNEL=="fb[0-9]*", TAG+="seat", TAG+="master-of-seat"
+SUBSYSTEM=="drm", KERNEL=="card[0-9]*", TAG+="seat", TAG+="master-of-seat"
 SUBSYSTEM=="usb", ATTR{bDeviceClass}=="09", TAG+="seat"
 
 # 'Plugable' USB hub, sound, network, graphics adapter
diff --git a/src/login/inhibit.c b/src/login/inhibit.c
index 57cfb5d0b5..0e5dce5925 100644
--- a/src/login/inhibit.c
+++ b/src/login/inhibit.c
@@ -33,6 +33,7 @@
 #include "strv.h"
 #include "formats-util.h"
 #include "process-util.h"
+#include "signal-util.h"
 
 static const char* arg_what = "idle:sleep:shutdown";
 static const char* arg_who = NULL;
@@ -274,6 +275,9 @@ int main(int argc, char *argv[]) {
                 if (pid == 0) {
                         /* Child */
 
+                        (void) reset_all_signal_handlers();
+                        (void) reset_signal_mask();
+
                         close_all_fds(NULL, 0);
 
                         execvp(argv[optind], argv + optind);
diff --git a/src/login/logind-dbus.c b/src/login/logind-dbus.c
index 10a9df0961..b272401e5b 100644
--- a/src/login/logind-dbus.c
+++ b/src/login/logind-dbus.c
@@ -2522,6 +2522,7 @@ int match_job_removed(sd_bus_message *message, void *userdata, sd_bus_error *err
                 session_jobs_reply(session, unit, result);
 
                 session_save(session);
+                user_save(session->user);
                 session_add_to_gc_queue(session);
         }
 
diff --git a/src/login/logind-user.c b/src/login/logind-user.c
index dc3db9abda..c0b473930d 100644
--- a/src/login/logind-user.c
+++ b/src/login/logind-user.c
@@ -738,54 +738,70 @@ int user_kill(User *u, int signo) {
         return manager_kill_unit(u->manager, u->slice, KILL_ALL, signo, NULL);
 }
 
+static bool elect_display_filter(Session *s) {
+        /* Return true if the session is a candidate for the user’s ‘primary
+         * session’ or ‘display’. */
+        assert(s);
+
+        return (s->class == SESSION_USER && !s->stopping);
+}
+
+static int elect_display_compare(Session *s1, Session *s2) {
+        /* Indexed by SessionType. Lower numbers mean more preferred. */
+        const int type_ranks[_SESSION_TYPE_MAX] = {
+                [SESSION_UNSPECIFIED] = 0,
+                [SESSION_TTY] = -2,
+                [SESSION_X11] = -3,
+                [SESSION_WAYLAND] = -3,
+                [SESSION_MIR] = -3,
+                [SESSION_WEB] = -1,
+        };
+
+        /* Calculate the partial order relationship between s1 and s2,
+         * returning < 0 if s1 is preferred as the user’s ‘primary session’,
+         * 0 if s1 and s2 are equally preferred or incomparable, or > 0 if s2
+         * is preferred.
+         *
+         * s1 or s2 may be NULL. */
+        if ((s1 == NULL) != (s2 == NULL))
+                return (s1 == NULL) - (s2 == NULL);
+
+        if (s1->stopping != s2->stopping)
+                return s1->stopping - s2->stopping;
+
+        if ((s1->class != SESSION_USER) != (s2->class != SESSION_USER))
+                return (s1->class != SESSION_USER) - (s2->class != SESSION_USER);
+
+        if ((s1->type == _SESSION_TYPE_INVALID) != (s2->type == _SESSION_TYPE_INVALID))
+                return (s1->type == _SESSION_TYPE_INVALID) - (s2->type == _SESSION_TYPE_INVALID);
+
+        if (s1->type != s2->type)
+                return type_ranks[s1->type] - type_ranks[s2->type];
+
+        return 0;
+}
+
 void user_elect_display(User *u) {
-        Session *graphical = NULL, *text = NULL, *other = NULL, *s;
+        Session *s;
 
         assert(u);
 
         /* This elects a primary session for each user, which we call
          * the "display". We try to keep the assignment stable, but we
          * "upgrade" to better choices. */
+        log_debug("Electing new display for user %s", u->name);
 
         LIST_FOREACH(sessions_by_user, s, u->sessions) {
-
-                if (s->class != SESSION_USER)
-                        continue;
-
-                if (s->stopping)
+                if (!elect_display_filter(s)) {
+                        log_debug("Ignoring session %s", s->id);
                         continue;
+                }
 
-                if (SESSION_TYPE_IS_GRAPHICAL(s->type))
-                        graphical = s;
-                else if (s->type == SESSION_TTY)
-                        text = s;
-                else
-                        other = s;
-        }
-
-        if (graphical &&
-            (!u->display ||
-             u->display->class != SESSION_USER ||
-             u->display->stopping ||
-             !SESSION_TYPE_IS_GRAPHICAL(u->display->type))) {
-                u->display = graphical;
-                return;
-        }
-
-        if (text &&
-            (!u->display ||
-             u->display->class != SESSION_USER ||
-             u->display->stopping ||
-             u->display->type != SESSION_TTY)) {
-                u->display = text;
-                return;
+                if (elect_display_compare(s, u->display) < 0) {
+                        log_debug("Choosing session %s in preference to %s", s->id, u->display ? u->display->id : "-");
+                        u->display = s;
+                }
         }
-
-        if (other &&
-            (!u->display ||
-             u->display->class != SESSION_USER ||
-             u->display->stopping))
-                u->display = other;
 }
 
 static const char* const user_state_table[_USER_STATE_MAX] = {