Per comments #32 and #33, this bug is closed because it required specific debugging to be done by the original reporter (which may yield different results for each person). Since no answer was received to comment #19 after 60 days this bug closed automatically.
You may choose to join bug 1847566 instead, or you may choose to open a new bug by running: ubuntu-bug gnome-shell as mentioned in comment #21 :) -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to mutter in Ubuntu. https://bugs.launchpad.net/bugs/1774188 Title: Unlocking the screen takes 5 seconds in Xorg sessions (not so much in Wayland sessions) Status in gdm3 package in Ubuntu: Expired Status in gnome-shell package in Ubuntu: Expired Status in mutter package in Ubuntu: Expired Status in xorg-server package in Ubuntu: Expired Bug description: This is a fresh installation of 18.04. After entering the password and pressing enter, it takes 5 seconds for the lock screen to disappear. This problem didn't happen on the same machine with 16.04 or 14.04. ProblemType: Bug DistroRelease: Ubuntu 18.04 Package: gdm3 3.28.0-0ubuntu1 ProcVersionSignature: Ubuntu 4.15.0-22.24-generic 4.15.17 Uname: Linux 4.15.0-22-generic x86_64 ApportVersion: 2.20.9-0ubuntu7 Architecture: amd64 CurrentDesktop: ubuntu:GNOME Date: Wed May 30 15:31:48 2018 InstallationDate: Installed on 2018-05-04 (25 days ago) InstallationMedia: Ubuntu 18.04 LTS "Bionic Beaver" - Release amd64 (20180426) SourcePackage: gdm3 UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm3/+bug/1774188/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp

