gethin, that seems plausibly like it could suffer from the same problems as #49579 -- if you have a menu open or a virtualbox window to a guest or similar, the screensaver 'lock' command may not be able to lock the display.
That's why we recommend using the lock interface in the menus or keyboard shortcuts, because both will either succeed easily or visibly fail before you make the next step manually. Thanks -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to gnome-screensaver in Ubuntu. https://bugs.launchpad.net/bugs/1280300 Title: Desktop contents displayed on resume, before lock screen is shown Status in gnome-screensaver package in Ubuntu: Invalid Bug description: I am running 14.04. When I resume from sleep, the contents of my desktop (including any open windows, emails, etc) are displayed onscreen briefly before the unlock screen is shown. This potentially allows an attacker to view the contents of a locked screen. To reproduce: 1) Suspend a machine, e.g. by closing the lid 2) Resume the machine Expected results: Upon resume, the first thing shown onscreen is the screensaver unlock screen. Actual results: Upon resume, the first thing shown onscreen is the set of open windows that were displayed before the machine was put to sleep. After a second or two, the unlock screen is drawn and you have to enter a password to unlock the machine. This is reproducible on my system. ProblemType: Bug DistroRelease: Ubuntu 14.04 Package: gnome-screensaver 3.6.1-0ubuntu9 ProcVersionSignature: Ubuntu 3.13.0-8.28-generic 3.13.2 Uname: Linux 3.13.0-8-generic x86_64 ApportVersion: 2.13.2-0ubuntu2 Architecture: amd64 CurrentDesktop: Unity Date: Fri Feb 14 09:05:50 2014 DistributionChannelDescriptor: # This is a distribution channel descriptor # For more information see http://wiki.ubuntu.com/DistributionChannelDescriptor canonical-oem-somerville-precise-amd64-20130203-1 EcryptfsInUse: Yes GnomeSessionIdleInhibited: No GnomeSessionInhibitors: None GsettingsGnomeSession: org.gnome.desktop.session session-name 'ubuntu' org.gnome.desktop.session idle-delay uint32 300 InstallationDate: Installed on 2013-12-02 (73 days ago) InstallationMedia: Ubuntu 12.04 "Precise" - Build amd64 LIVE Binary 20130203-13:50 SourcePackage: gnome-screensaver UpgradeStatus: Upgraded to trusty on 2014-02-12 (1 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/gnome-screensaver/+bug/1280300/+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
