diff --git a/sys/dev/pci/drm/drm_atomic_helper.c b/sys/dev/pci/drm/drm_atomic_helper.c
index 6c1be4f285b..131456680c2 100644
--- a/sys/dev/pci/drm/drm_atomic_helper.c
+++ b/sys/dev/pci/drm/drm_atomic_helper.c
@@ -1919,7 +1919,7 @@ drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
 		ret = wait_event_timeout(dev->vblank[i].queue,
 					 state->crtcs[i].last_vblank_count !=
 						drm_crtc_vblank_count(crtc),
-					 msecs_to_jiffies(100));
+					 msecs_to_jiffies(1000));
 
 		WARN(!ret, "[CRTC:%d:%s] vblank wait timed out\n",
 		     crtc->base.id, crtc->name);