Hostapd probe frame monitoring

Using hostapd how can Probe Frame requests be listened too. I've enabled verbose debugging on all radios, but no probe requests show up in the logs. Does a radio need to be configured for monitor mode instead of AP mode to do this?

You’ll need to recompile the hostapd-source packages with verbose debugging enabled. My recollection is that the config parameter has WPA in it and wasn’t intuitive until I looked at the description.