Screen suspends/locks again after unlocking

[matyy]

I am not really sure what causes this bug, but here is the description:

1. Lock the screen (Ctrl+Alt+L)
2. Unlock
3. Screen is locked again

If I disable locking upon the display turning off, this happens:

1. Lock the screen (Ctrl+Alt+L)
2. Unlock
3. Screen fades to black, restores.

It seems while being locked it wants to suspend the screen. When unlocking, it goes actually suspends the screen and than I have to unlock it again.

I filed the bug report against unity, using ubuntu-bug. I don't know what package is causing the problem, tough.

ProblemType: Bug
DistroRelease: Ubuntu 14.04
Package: unity 7.1.2+14.04.20140312-0ubuntu1
ProcVersionSignature: Ubuntu 3.13.0-17.37-generic 3.13.6
Uname: Linux 3.13.0-17-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.13.3-0ubuntu1
Architecture: amd64
CompizPlugins: No value set for `/apps/compiz-1/general/screen0/options/active_plugins'
CurrentDesktop: Unity
Date: Thu Mar 13 17:13:50 2014
InstallationDate: Installed on 2014-03-13 (0 days ago)
InstallationMedia: Ubuntu 14.04 LTS "Trusty Tahr" - Alpha amd64 (20140312)
ProcEnviron:
 LANGUAGE=de_DE
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=de_DE.UTF-8
 SHELL=/bin/bash
SourcePackage: unity
UpgradeStatus: No upgrade log present (probably fresh install)

[Launchpad Janitor (janitor)]

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