diff --git a/data/udev/90-HOTPLUG_display-visor.rules b/data/udev/90-HOTPLUG_display-visor.rules
index 034a76d..be902c7 100644
--- a/data/udev/90-HOTPLUG_display-visor.rules
+++ b/data/udev/90-HOTPLUG_display-visor.rules
@@ -1 +1 @@
-ACTION=="change", SUBSYSTEM=="drm", ENV{HOTPLUG}=="1", RUN+="pkill -RTMIN+5 display-visor"
+ACTION=="change", SUBSYSTEM=="drm", ENV{HOTPLUG}=="1", RUN+="/usr/bin/pkill -x -RTMIN+5 display-visor"
diff --git a/src/display-visor b/src/display-visor
index 62e7608..bf6f93c 100755
--- a/src/display-visor
+++ b/src/display-visor
@@ -94,6 +94,8 @@ declare_outputs ()
         if [ "connected" == "$status" ]; then
             echo "$prefix $dev connected"
             declare -gA $dev="yes"
+        else
+            unset $dev
         fi
     done <<< "$devices"
 }