I have this same problem on 18.04. It's very noticeable that when my network has no DNS working, screen unlock takes a long time - as much as a minute or two.
I notice this because I often manually configure my network to do DNS lookups over an SSH tunnel. If I just close the lid of my laptop it locks and then goes to sleep, and of course when I open it again the SSH session is down & I have no DNS. In this state, the screen unlock is really slow. If I shut the lid not in this state, screen unlock is quick as normal. I use an Xorg session. -- 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: Incomplete Status in gnome-shell package in Ubuntu: Incomplete Status in mutter package in Ubuntu: Incomplete Status in xorg-server package in Ubuntu: Incomplete 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 : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp
