I think that I am having the same issue on Ubuntu 17.10 now. I've had other performance issues related to Gnome-Keyring and Chrome. During those times, top shows that Gnome-Keyring is using a good portion of the CPU. When I unlock and check top, I don't see Gnome-Keyring, so it's probably a different issue.
-- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gdm in Ubuntu. https://bugs.launchpad.net/bugs/1235549 Title: Lock Screen is extremely slow Status in gdm package in Ubuntu: Confirmed Bug description: When my system has a message in my user session but my screen is locked, such as if my Google account needs to authenticate again using the GNOME Online Accounts manager, this will often cause the entire GDM to slow down or freeze up entirely, making quick and easy access to my system not so quick-and-easy. ProblemType: Bug DistroRelease: Ubuntu 13.10 Package: gdm 3.8.4-0ubuntu2 ProcVersionSignature: Ubuntu 3.11.0-11.17-generic 3.11.3 Uname: Linux 3.11.0-11-generic x86_64 ApportVersion: 2.12.5-0ubuntu1 Architecture: amd64 Date: Fri Oct 4 23:51:17 2013 InstallationDate: Installed on 2013-10-04 (0 days ago) InstallationMedia: Ubuntu-GNOME 13.10 "Saucy Salamander" - Beta amd64 (20130926) MarkForUpload: True ProcEnviron: PATH=(custom, no user) XDG_RUNTIME_DIR=<set> LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: gdm UpgradeStatus: No upgrade log present (probably fresh install) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gdm/+bug/1235549/+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

