diff --git a/piker/ui/_dataviz.py b/piker/ui/_dataviz.py
index 89e46337..494ef985 100644
--- a/piker/ui/_dataviz.py
+++ b/piker/ui/_dataviz.py
@@ -1062,7 +1062,6 @@ class Viz(msgspec.Struct):  # , frozen=True):
             else:
                 log.warning(f'Unknown view state {vl} -> {vr}')
                 return
-                # raise RuntimeError(f'Unknown view state {vl} -> {vr}')
 
         else:
             # maintain the l->r view distance
diff --git a/piker/ui/_fsp.py b/piker/ui/_fsp.py
index 8fa7fd82..c546ec96 100644
--- a/piker/ui/_fsp.py
+++ b/piker/ui/_fsp.py
@@ -707,7 +707,7 @@ async def open_vlm_displays(
 
         last_val_sticky.update_from_data(-1, value)
 
-        _, vlm_curve = vlm_viz.update_graphics()
+        _, _, vlm_curve = vlm_viz.update_graphics()
 
         # size view to data once at outset
         vlm_chart.view._set_yrange(