From 85982d61790dbbf940c12ad6e747bb1ada0b1355 Mon Sep 17 00:00:00 2001
From: ceroma <165659-ceroma@users.noreply.gitlab.gnome.org>
Date: Thu, 18 Dec 2025 06:00:26 +0000
Subject: [PATCH] local-display-factory: look for 'boot_display' sysfs attr

---
 daemon/gdm-local-display-factory.c | 23 +++++++++++++++++++++--
 1 file changed, 21 insertions(+), 2 deletions(-)

diff --git a/daemon/gdm-local-display-factory.c b/daemon/gdm-local-display-factory.c
index e284f7992..f1ccf643a 100644
--- a/daemon/gdm-local-display-factory.c
+++ b/daemon/gdm-local-display-factory.c
@@ -424,6 +424,7 @@ udev_is_settled (GdmLocalDisplayFactory *factory)
                 const gchar *id_path = g_udev_device_get_property (device, "ID_PATH");
                 g_autoptr (GUdevDevice) platform_device = NULL;
                 g_autoptr (GUdevDevice) pci_device = NULL;
+                g_autoptr (GUdevDevice) drm_device = NULL;
 
                 if (g_strrstr (id_path, "platform-simple-framebuffer") != NULL) {
                         node = next_node;
@@ -451,10 +452,28 @@ udev_is_settled (GdmLocalDisplayFactory *factory)
                                  factory->seat0_has_boot_up_graphics = TRUE;
                                  is_settled = TRUE;
                                  break;
-                        } else {
-                                 g_debug ("GdmLocalDisplayFactory: Found secondary PCI graphics adapter, not proceeding yet.");
                         }
                 }
+
+                drm_device = g_udev_device_get_parent_with_subsystem (device, "drm", NULL);
+
+                if (drm_device != NULL) {
+                        gboolean boot_display;
+
+                        boot_display = g_udev_device_get_sysfs_attr_as_int (drm_device, "boot_display");
+
+                        if (boot_display == 1) {
+                                 g_debug ("GdmLocalDisplayFactory: Found primary PCI graphics adapter, proceeding.");
+                                 factory->seat0_has_boot_up_graphics = TRUE;
+                                 is_settled = TRUE;
+                                 break;
+                        }
+                }
+
+                if (pci_device != NULL || drm_device != NULL) {
+                        g_debug ("GdmLocalDisplayFactory: Found secondary PCI graphics adapter, not proceeding yet.");
+                }
+
                 node = next_node;
         }
 
-- 
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