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After I close the lid of the laptop it doesn't enter in suspend mode. This happened immediately after an update of Ubuntu 18.04. I use the setting suspends when the laptop lid is closed OFF until I find a solution.

Why it doesn't suspend mode work?

  • I did a new installation of ubuntu and the result is the same : suspend mode doesn't work. The login screen remains locked and i must press and hold the power button to restart the os. – tt177 Aug 5 at 16:54
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In Ubuntu 18.04 Gnome desktop, there’s no option in Settings utility for configuring laptop lid close actions. And Gnome Tweaks only offer a switch to enable/disable ‘Suspend when the laptop lid is closed.

Follow the steps:

  • Open Terminal
  • Paste the following command in the Terminal sudo gedit /etc/systemd/logind.conf
  • Provide your system password if it asks.
  • Now you need to find the line #HandleLidSwitch=suspend & uncomment it (Remove the # from the beginning).
  • It will be like the below image: enter image description here

  • Save and exit the file.

  • Now restart the Systemd service using the following command: systemctl restart systemd-logind.service

That's it, This method will fix your issue.

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