[Bug 1848225] [NEW] netplan fails to configure wifi on rpi4 with eoan

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I was able to successfully configure wifi with NetworkManager, but if I
try to configure it with netplan it doesn't seem to work.

I've also tested this on rpi3b+ with eoan and it worked fine there.
To test this, I ensured all networkmanager connections for wifi were deleted, and that it was in an unconfigured state. Then I added this to /etc/netplan/99-netplanbg.yaml:
network:
  version: 2
  wifis:
    wlan0:
      access-points:
        ubuntu-cert-bg-open-tpelab: {}
      addresses: []
      dhcp4: True
      nameservers: {}

(I've also tried this with other test networks of bg/n/ac and open/wpa - none work for me)
After running 'sudo netplan apply', I see in networkctl that it goes into a "configuring" state, but it never goes to configured/routable and never gets an ip address.

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: netplan (not installed)
ProcVersionSignature: User Name 5.3.0-1007.8-raspi2 5.3.1
Uname: Linux 5.3.0-1007-raspi2 armv7l
ApportVersion: 2.20.11-0ubuntu8
Architecture: armhf
Date: Tue Oct 15 16:23:58 2019
ProcEnviron:
 TERM=xterm-256color
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=C.UTF-8
 SHELL=/bin/bash
SourcePackage: plan
UpgradeStatus: No upgrade log present (probably fresh install)

** Affects: netplan.io (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: apport-bug armhf eoan uec-images
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netplan fails to configure wifi on rpi4 with eoan
https://bugs.launchpad.net/bugs/1848225
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