Discovery not working at all after upgrade to 0.38.2

After upgrading to 0.38.2 from 0.36, none of the devices typically found by discovery are being discovered. These include 3 Rokus (all of which have device names in the Roku portal - one of the reasons I wanted to upgrade HA was so that I could remove the customizations I’ve had in place in HA to rename the discovered devices to the same names I use in the portal) and a Hue bridge. Given that these devices (at least the Rokus, not sure about the Hue) have no way to configure a static IP and my current router doesn’t allow for fixed IPs per MAC via DHCP, I really don’t want to have to manually configure them and tie the configs to IPs that may change. I don’t see any errors in the logs and I do see a log entry about netdisco starting to scan, it just never actually discovers anything.

Also, I love the new snappy web UI, but it no longer works for me when behind a SOCKS proxy (like, say, using an SSH tunnel). If I VPN into my network from outside, I can pull up the web interface. If I’m using an SSH tunnel with a dynamic forward as a SOCKS proxy, it just shows the HA logo with a spinning circle forever. Prior to the upgrade (so, at least until 0.36) the web frontend worked just fine via the proxy - the only issue was that it always showed a notice that it wasn’t connected to HA, but really everything worked.

You should report the bug here: https://github.com/home-assistant/home-assistant/issues/new

Done: https://github.com/home-assistant/home-assistant/issues/5947

I was hoping this was something I could troubleshoot more before filing an issue, though - are there any logs for netdisco, or is there any way to make netdisco provide debug output?

Update: It looks like discovery may be working, but it’s taking well over half an hour for the devices to be discovered now where is was less than a minute before.