The lock screen is handled by gnome-shell, so this is unlikely a gdm issue. gnome-screensaver is only used in fallback mode (and Unity).
Can you reproduce the issue and then attach '~/.cache/gdm/session.log' (You willl need to switch to a VT and grab the file before restarting gdm/g-s or it will get overwritten) Also you may want to try installing gnome-settings-daemon from gnome3-team ppa, that will fix atleast one issue where the internal X screensaver fires when it shouldnt ** Package changed: gdm (Ubuntu) => gnome-shell (Ubuntu) -- 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/1087701 Title: Lock screen broken after suspend/resume Status in “gnome-shell” package in Ubuntu: Confirmed Bug description: In gnome-shell the new lock screen almost never works right if I suspend by letting the computer idle (or if I let it idle long enough for the screen to turn off and then close the lid). Upon resume I either see a black screen and a movable mouse cursor or a frozen image of the desktop before I suspended. I see the exact same issue was in arch linux, but was fixed with the update to gnome 3.6.2. https://bbs.archlinux.org/viewtopic.php?id=151967 We still have gdm/gnome-screensaver 3.6.1/3.6.0 in quantal. Could we get an update to 3.6.2 in quantal? The topic doesn't say for sure whether it was the GDM or gnome-screensaver update that fixed it. ProblemType: Bug DistroRelease: Ubuntu 12.10 Package: gnome-screensaver 3.6.0-0ubuntu2 ProcVersionSignature: Ubuntu 3.5.0-19.30-generic 3.5.7 Uname: Linux 3.5.0-19-generic x86_64 ApportVersion: 2.6.1-0ubuntu6 Architecture: amd64 Date: Fri Dec 7 08:52:07 2012 GnomeSessionIdleInhibited: No GnomeSessionInhibitors: None GsettingsGnomeSession: org.gnome.desktop.session idle-delay uint32 600 org.gnome.desktop.session session-name 'gnome' InstallationDate: Installed on 2012-12-06 (0 days ago) InstallationMedia: Ubuntu GNOME Remix 12.10 "Quantal Quetzal" - Release amd64(20121023) MarkForUpload: True ProcEnviron: LANGUAGE=en_US:en PATH=(custom, no user) LANG=en_US.UTF-8 SHELL=/bin/bash SourcePackage: gnome-screensaver UpgradeStatus: No upgrade log present (probably fresh install) modified.conffile..etc.xdg.autostart.gnome.screensaver.desktop: [modified] mtime.conffile..etc.xdg.autostart.gnome.screensaver.desktop: 2012-12-06T15:41:21.659897 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-shell/+bug/1087701/+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