Need fb attached

diff --git a/linux-core/drm_crtc.c b/linux-core/drm_crtc.c
index bdea20c..5bc0220 100644 (file)
--- a/linux-core/drm_crtc.c
+++ b/linux-core/drm_crtc.c
@@ -914,7 +914,9 @@ bool drm_initial_config(struct drm_device *dev, bool can_grow)
                if (!output->crtc || !output->crtc->desired_mode)
                        continue;
 
-               drm_crtc_set_mode(output->crtc, output->crtc->desired_mode, 0, 0);
+               /* and needs an attached fb */
+               if (output->crtc->fb)
+                       drm_crtc_set_mode(output->crtc, output->crtc->desired_mode, 0, 0);
        }
 
        drm_disable_unused_functions(dev);