lockscreen: on autolock on suspend the fade does not complete before suspend leaving desktop partially visible for a short period on resume

[Andy Whitcroft]

When auto-locking as part of a suspend operation the lock screen still fades to opaque, this takes seconds and mid fade the suspend occurs. This means that on waking the machine the fade is still occurring and the desktop is partially visible potentially exposing information protected by the lock.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity 7.1.2+14.04.20140313-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-17.37-generic 3.13.6
Uname: Linux 3.13.0-17-generic x86_64
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CurrentDesktop: Unity
Date: Fri Mar 14 10:02:52 2014
EcryptfsInUse: Yes
InstallationDate: Installed on 2013-06-20 (266 days ago)
InstallationMedia: Ubuntu 13.10 "Saucy Salamander" - Alpha amd64 (20130618)
SourcePackage: unity
UpgradeStatus: Upgraded to trusty on 2013-11-10 (123 days ago)

[Seth Arnold (seth-arnold)]

I've been closing all bugreports similar to this as a duplicate of LP: #49579 because all the time-based locking mechanisms are so brittle that none can be expected to work reliably.

Has this changed with the new Unity-based lockscreen? Will an application grabbing the mouse (indicators, menus, etc.) prevent the screen locker from locking? Or does the new Unity lock screen break those grabs in a fashion that locking can work reliably? (I'm skeptical.)

Thanks

[Mateusz Stachowski (stachowski-mateusz)]

The new Unity lock screen doesn't have problem with application grabbing the mouse (indicators, menus, etc.) but only if the mouse cursor is outside of that menu. When you open menu of application (global or LIM) or indicator then move the cursor outside of that menu and application the screen will blank off and lock.

When you have open indicator or menu of application (global or LIM) and mouse is focused on that menu the screen will not blank off and of course it will also not lock.

This is still a bug in gnome-screensaver and X server just like the one that you linked because the new Unity lock screen still uses gnome-screensaver.

[Mateusz Stachowski (stachowski-mateusz)]

Also if you have open the right click context menu of any application (for example terminal) the screen will not blank off and it will not lock. In this case it doesn't lock even if the mouse cursor is outside of the menu and application.

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.

[Seth Arnold (seth-arnold)]

Thanks for the information Mateusz.