Bug 341189

Summary: Screen shows for a moment when returning from suspension, before showing log in screen
Product: [Unmaintained] kscreensaver Reporter: kelna91
Component: locker-qmlAssignee: Plasma Bugs List <plasma-bugs-null>
Status: RESOLVED FIXED    
Severity: normal CC: mgraesslin
Priority: NOR    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: Kubuntu   
OS: Linux   
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description kelna91 2014-11-23 00:48:55 UTC 
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.
Comment 1 Martin Flöser 2015-01-23 13:38:11 UTC 
Should be fixed with Plasma 5.2 - see http://blog.martin-graesslin.com/blog/2015/01/locking-the-screen-before-system-suspends/