Location: Distance / Proximity returns no results

My problem is when I add the Location: Distance / Proximity filter to my view, the only way I have been able to get any results to display is if I explicitly enter the Longitude/Latitude. I cannot use exposed and optional for long/lat, I cannot use by zip, either hidden or exposed. It will return the famous "AND (0)" in the query, and no results.

I've tried looking for patches, and couldn't find any that work. The issue seems semi-popular, but no clear-cut answers. Any help is greatly appreciated.