Pod filtering panel broken

[pavanfhw]

Panel does not show anything.

Whats is the pod name that should be used to manually change the queries? I tried the pod name as given in kubectl get pods -o wide but it has no effect.
sum(container_memory_usage_bytes{pod_name=~"$pod"}) by (pod_name)

[lakshleo]

I was able to make the charts working by changing the metric name from "pod_name" to "pod".
The charts are displayed but the top panel is not working. Any help regarding it would be appreceated.