lock screen short cut working randomely

[Abhijit Navale]

Hi.
I am using Ubuntu Lucid Lynx 10.04 (64 bit).

The short cut ctrl+alt+L that is the default shortcut for Lock screen is not working always.
Sometimes it work and sometimes it dont.

Sometimes I need to minimize all windows and go to desktop to make it work. But this solution also don't work always.
Sometimes minimizing one windows will also work.
This is all randomly happening.

ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: libgnomekbd4 2.30.2-0ubuntu0.1
ProcVersionSignature: Ubuntu 2.6.32-24.41-generic 2.6.32.15+drm33.5
Uname: Linux 2.6.32-24-generic x86_64
Architecture: amd64
Date: Sun Aug 22 11:49:31 2010
InstallationMedia: Ubuntu 10.04 LTS "Lucid Lynx" - Release amd64 (20100429)
ProcEnviron:
 LANG=en_IN
 SHELL=/bin/bash
SourcePackage: libgnomekbd

[SabreWolfy (sabrewolfy)]

After latest Maverick Meerkat updates, "lock screen" shortcuts no longer work. Not sure if it's related.