This fix works for me:
1. As root, create a file named /etc/systemd/system/resume.service with
the following contents:
[Unit]
Description=Local system resume actions
After=suspend.target
[Service]
Type=oneshot
ExecStart=/bin/systemctl restart NetworkManager.service
[Install]
WantedBy=suspend.target
####################
sudo systemctl enable resume.service
sudo systemctl daemon-reload
Now after a suspend resume, I the Network Manager icon reloads almost
instantly, and wifi comes back.
You can confirm the action ran by checking it's service log after a
resume:
journalctl -u resume.service
Jun 01 11:29:11 myhost systemd[1]: Starting Local system resume actions...
Jun 01 11:29:12 myhost systemd[1]: Started Local system resume actions.
If you want to trigger other actions to run at "resume" time, you can
add additional "ExecStart=" lines to the file.
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https://bugs.launchpad.net/bugs/1422143
Title:
No wifi connection after suspend with systemd due to missing "wpa_cli
suspend"
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