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

[Markus1978]

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

[Markus1978 (mk-cactus)]

Forgot to mention Ubuntu Mate :-/

[Markus1978 (mk-cactus)]

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

[Sebastien Bacher (seb128)]

Could you add your 'journalctl -b 0' log after getting the issue?

[Markus1978 (mk-cactus)]

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

[Launchpad Janitor (janitor)]

[Expired for network-manager (Ubuntu) because there has been no activity for 60 days.]