Please: sudo apt install openssh-server
so that you can log into the machine before/while the lid is closed. Then while the lid is closed and the machine overheating, please run: top and tell us what process is using the most CPU? Or just take a screenshot. ** Package changed: xorg (Ubuntu) => ubuntu ** Changed in: ubuntu Status: New => Incomplete -- You received this bug notification because you are a member of Ubuntu-X, which is subscribed to xorg in Ubuntu. https://bugs.launchpad.net/bugs/1837453 Title: 18.04 overheating at lock screen or closed lid To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+bug/1837453/+subscriptions _______________________________________________ Mailing list: https://launchpad.net/~ubuntu-x-swat Post to : ubuntu-x-swat@lists.launchpad.net Unsubscribe : https://launchpad.net/~ubuntu-x-swat More help : https://help.launchpad.net/ListHelp