After the system has been put to sleep by closing the lid of the laptop it so happens that the previous screens are visible for more than a few seconds after the system wakes up. Though no interactions are possible but everything is visible on the screen. This is a security nightmare under certain condition.

Reproducible: Always

Steps to Reproduce:
1. Put the laptop to sleep after closing the lid while logged in
2. Open the laptop lid to wake up the system. 


Actual Results:  
You can see whatever was visible on the screen when the user was logged in

Expected Results:  
Lock screen should be displayed

Currently for security we have to first lock the screen and then put the system to sleep