Desktop is shown when user comes back when screenlock/blank is activated

[Gabriel]

When I either lock the screen or it locks by itself (and goes blank), when I come back and move the mouse is shows the desktop & open windows for about a second before it blanks again and then asks for the password. This started happening with Ubuntu 11.04 after an upgrade from 10.10; I was hoping it would go away with an upgrade to 11.10 but this was not the case.

Here is the info you asked for:

$ lsb_release -rd
Description: Ubuntu 11.10
Release: 11.10

$ apt-cache policy gnome-screensaver
gnome-screensaver:
  Installed: 3.2.0-0ubuntu1
  Candidate: 3.2.0-0ubuntu1
  Version table:
 *** 3.2.0-0ubuntu1 0
        500 http://ch.archive.ubuntu.com/ubuntu/ oneiric/main i386 Packages
        100 /var/lib/dpkg/status

What is expected:
1) The screen goes blank & locks
2) The user comes back and moves the mouse
3) The screen stays blank and the password dialog comes up, the user does not see anything else

What happens:
1) The screen goes blank & locks
2) The user comes back and moves the mouse
3) The screen shows the desktop for a second (and any windows open at the time), then it blanks again and shows the password dialog.

I believe this is a security issue too, although one could argue a small one, but it allows someone who has physical access to the PC to see the screen for a second even when it is locked. I will not flag is as a security issue though, I'll let the Ubuntu team decide if if is considered one by their standards.

[Ubuntu Foundations Team Bug Bot (crichton)]

Thank you for taking the time to report this bug and helping to make Ubuntu better. It seems that your bug report is not filed about a specific source package though, rather it is just filed against Ubuntu in general. It is important that bug reports be filed about source packages so that people interested in the package can find the bugs about it. You can find some hints about determining what package your bug might be about at https://wiki.ubuntu.com/Bugs/FindRightPackage. You might also ask for help in the #ubuntu-bugs irc channel on Freenode.

To change the source package that this bug is filed about visit https://bugs.launchpad.net/ubuntu/+bug/908365/+editstatus and add the package name in the text box next to the word Package.

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