Bug 341189

When I return from suspension to RAM, the screen shows for a moment, before the login screen appears. This is a problem because with a camcorder someone could record this and so be able to see the content of the screen, maybe sensitive information, on a suspended, locked computer.
I use Kubuntu 14.10 but this happened on 14.04 also.

Reproducible: Sometimes

Steps to Reproduce:
1. Do stuff.
2. Suspend to RAM.
3. Wake the computer by pressing any key.

Actual Results:  
If it happens:
1. Fans start up.
2. After a second or two the screen lights up showing exactly how I left work. This last only for a tenth of a second or so.
3. Lock screen appears.

If this doesn't happen:
Instead of showing the screen content, some error message appers also for a moment only. Something like this (I recorded the screen):
usb 3-14: hub failed to enable device, error -22
xhci_hcd 0000:00:14.0: Setup ERROR: setup context command for slot 4.

Expected Results:  
Should not show the screen content (or error messages). After returning from suspension the only thing one should see is the login screen.

I use a HP notebook.