[youtube]http://www.youtube.com/watch?v=dIfSrPA6j6U[/youtube]
TVLocker is a tweak published today in Cydia, and with its help we can modify the animation that is played when we lock an iDevice. The animation run by TVLocker is similar to the one introduced on the iOS platform by TV Tube Sleep(presented in the video clip above) and basically you will see on the screen of your iDevice everything you see when you close an old TV. TVLocker is not the first tweak of this kind in Cydia, but it should be compatible with iOS 5.x, so you can try it.
TVLocker can be installed from Cydia's BigBoss repo.
UPDATE: Installing the tweak could put you in a restore situation.
