Another thing I noticed recently:

I've disabled standby when closing the Lid. If I trigger standby
manually and then close the lid, the networking resumes as expected
after waking the computer up.

HTH, Markus

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You received this bug notification because you are a member of Ubuntu
Touch seeded packages, which is subscribed to network-manager in Ubuntu.
https://bugs.launchpad.net/bugs/1883477

Title:
  When closing the lid of laptop, WiFi disconnects and doesn't reconnect
  afterwards

Status in network-manager package in Ubuntu:
  New

Bug description:
  I am getting this issue since about a year on my Lenovo Thinkpad x240
  with Ubuntu Mate

  I have configured the computer to stay awake and empty the screen
  (system settings > power management) when I close the lid with the
  power plugged in.

  What I expect to happen:
  Wifi network stays connected and network related programs (like bit-torrent 
or http downloads) continue to run.

  What actually happens:
  Wifi always disconnects after closing the lid and doesn't come back upon 
opening it.
  I just see a "two arrows"-symbol on the top bar.

  When I try to reconnect manually, the wifi symbol is blinking, but the 
network manager eventually gives up.
  I have to disable wifi (or network as a whole) for a second and enable it 
again, to then automatically reconnect to my home wifi network.

  ProblemType: Bug
  DistroRelease: Ubuntu 20.04
  Package: network-manager 1.22.10-1ubuntu2.1
  ProcVersionSignature: Ubuntu 5.4.0-37.41-generic 5.4.41
  Uname: Linux 5.4.0-37-generic x86_64
  ApportVersion: 2.20.11-0ubuntu27.2
  Architecture: amd64
  CasperMD5CheckResult: skip
  CurrentDesktop: MATE
  Date: Mon Jun 15 06:09:25 2020
  IfupdownConfig:
   # interfaces(5) file used by ifup(8) and ifdown(8)
   # Include files from /etc/network/interfaces.d:
   source-directory /etc/network/interfaces.d
  InstallationDate: Installed on 2019-12-06 (191 days ago)
  InstallationMedia: Ubuntu-MATE 19.10 "Eoan Ermine" - Release amd64 (20191017)
  IpRoute:
   default via 192.168.2.1 dev wlp3s0 proto dhcp metric 600
   169.254.0.0/16 dev wlp3s0 scope link metric 1000
   192.168.2.0/24 dev wlp3s0 proto kernel scope link src 192.168.2.105 metric 
600
   192.168.122.0/24 dev virbr0 proto kernel scope link src 192.168.122.1 
linkdown
  ProcEnviron:
   LANGUAGE=de_DE
   PATH=(custom, no user)
   XDG_RUNTIME_DIR=<set>
   LANG=de_DE.UTF-8
   SHELL=/usr/bin/fish
  SourcePackage: network-manager
  UpgradeStatus: Upgraded to focal on 2020-05-07 (38 days ago)
  nmcli-nm:
   RUNNING  VERSION  STATE      STARTUP  CONNECTIVITY  NETWORKING  WIFI-HW  
WIFI     WWAN-HW  WWAN
   running  1.22.10  connected  started  full          enabled     enabled  
enabled  enabled  disabled

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