[gnome-settings-daemon] power: Call backlight_enable() after session setup

[Bastien Nocera <hadess src gnome org>]

commit c0e5471502787531c1a8dde99ed949bfacddb804
Author: Bastien Nocera <hadess hadess net>
Date:   Fri Aug 11 17:33:13 2017 +0200

    power: Call backlight_enable() after session setup
    
    backlight_enable() does 2 things, fiddle with the DPMS as well
    as attempt to claim the light sensor. But the light sensor
    claim attempt will always fail as the "session_is_active" variable
    has not been initialised yet. So just try a tad later for it
    to work as soon as you've logged into the session.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=786164

 plugins/power/gsd-power-manager.c |    6 +++---
 1 files changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/plugins/power/gsd-power-manager.c b/plugins/power/gsd-power-manager.c
index 31d4170..7b287c6 100644
--- a/plugins/power/gsd-power-manager.c
+++ b/plugins/power/gsd-power-manager.c
@@ -2443,9 +2443,6 @@ on_rr_screen_acquired (GObject      *object,
         /* check whether a backlight is available */
         manager->priv->backlight_available = backlight_available (manager->priv->rr_screen);
 
-        /* ensure the default dpms timeouts are cleared */
-        backlight_enable (manager);
-
         /* Set up a delay inhibitor to be informed about suspend attempts */
         g_signal_connect (manager->priv->logind_proxy, "g-signal",
                           G_CALLBACK (logind_proxy_signal_cb),
@@ -2506,6 +2503,9 @@ on_rr_screen_acquired (GObject      *object,
         engine_coldplug (manager);
         idle_configure (manager);
 
+        /* ensure the default dpms timeouts are cleared */
+        backlight_enable (manager);
+
         manager->priv->xscreensaver_watchdog_timer_id = gsd_power_enable_screensaver_watchdog ();
 
         /* don't blank inside a VM */