[Bug 1862324] [NEW] Since upgrading to Ubuntu 19.10, WiFi card is not found after disconnecting from a VPN

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After installing Ubuntu 19.10, I connected to a VPN and later
disconnected from it. After disconnecting, the laptop (Dell XPS 13
(9370)) couldn't reconnect to the router. Checking Settings showed that
Ubuntu couldn't find the WiFi card. I had to reboot the laptop to
recover.

ProblemType: Bug
DistroRelease: Ubuntu 19.10
Package: ubuntu-release-upgrader-core 1:19.10.15.4
ProcVersionSignature: Ubuntu 5.3.0-29.31-generic 5.3.13
Uname: Linux 5.3.0-29-generic x86_64
ApportVersion: 2.20.11-0ubuntu8.2
Architecture: amd64
CrashDB: ubuntu
CurrentDesktop: ubuntu:GNOME
Date: Fri Feb  7 10:30:41 2020
DistributionChannelDescriptor:
 # This is a distribution channel descriptor
 # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor
 canonical-oem-somerville-xenial-amd64-20160624-2
InstallationDate: Installed on 2018-03-12 (697 days ago)
InstallationMedia: Ubuntu 16.04 "Xenial" - Build amd64 LIVE Binary 20160624-10:47
PackageArchitecture: all
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SourcePackage: ubuntu-release-upgrader
Symptom: dist-upgrade
UpgradeStatus: Upgraded to eoan on 2020-02-06 (0 days ago)
VarLogDistupgradeTermlog:
 
modified.conffile..etc.update-manager.release-upgrades: [modified]
mtime.conffile..etc.update-manager.release-upgrades: 2019-10-28T06:36:18.243092

** Affects: ubuntu-release-upgrader (Ubuntu)
     Importance: Undecided
         Status: New


** Tags: amd64 apport-bug dist-upgrade eoan
-- 
Since upgrading to Ubuntu 19.10, WiFi card is not found after disconnecting from a VPN
https://bugs.launchpad.net/bugs/1862324
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