Bug 755793

Summary: Screensaver in XFCE activates a few seconds after resume which allows display to be seen
Product: [Fedora] Fedora Reporter: James <fedorabugmail>
Component: xscreensaverAssignee: Mamoru TASAKA <mtasaka>
Status: CLOSED WONTFIX QA Contact: Fedora Extras Quality Assurance <extras-qa>
Severity: medium Docs Contact:
Priority: unspecified    
Version: 16CC: mtasaka, neteler
Target Milestone: ---   
Target Release: ---   
Hardware: x86_64   
OS: Linux   
Whiteboard:
Fixed In Version: Doc Type: Bug Fix
Doc Text:
Story Points: ---
Clone Of: Environment:
Last Closed: 2013-02-13 19:15:45 UTC Type: ---
Regression: --- Mount Type: ---
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Verified Versions: Category: ---
oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:

Description James 2011-11-22 03:57:33 UTC
Description of problem: If XFCE is suspended, the system enters hibernation and the display is disabled before any screensaver is activated. When the system is resumed the display is activated and the contents of the screen are shown until the fade-out and the screensaver activates. This is a potential security risk as the dialog to unlock the system is not displayed until after the screensaver starts. 


Version-Release number of selected component (if applicable): 


How reproducible: Suspend system then resume.


Steps to Reproduce:
1. Hibernate system
2. Resume system
3. Observe previous screen contents
  
Actual results: Screen not blank after resuming.


Expected results: Blank screen until credentials verified.


Additional info: This was tested with the screensaver 'disabled'.

Comment 1 Mamoru TASAKA 2011-11-22 07:47:48 UTC
How can xscreensaver know that the system is going to hibernate beforehand and lock the screen before hibernation? Or when system is being activated, how can xscreensaver lock the screen before activation is going to happen? I think it is impossible.

Comment 2 James 2011-11-22 23:58:41 UTC
I messed up the priority, it should be low(if a bug) as there are easy workarounds.

xscreensaver likely doesn't have a bug, but I would expect the overall system to not display the desktop after a resume, if the display is locked.

Comment 3 Fedora End Of Life 2013-01-16 15:59:54 UTC
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Comment 4 Fedora End Of Life 2013-02-13 19:15:48 UTC
Fedora 16 changed to end-of-life (EOL) status on 2013-02-12. Fedora 16 is 
no longer maintained, which means that it will not receive any further 
security or bug fix updates. As a result we are closing this bug.

If you can reproduce this bug against a currently maintained version of 
Fedora please feel free to reopen this bug against that version.

Thank you for reporting this bug and we are sorry it could not be fixed.

Comment 5 markusN 2014-01-06 21:47:27 UTC
(In reply to Mamoru TASAKA from comment #1)
> How can xscreensaver know that the system is going to hibernate beforehand
> and lock the screen before hibernation? 

Since I have the same security issue (I consider it as that) in F19, I searched
for a solution and found

https://wiki.archlinux.org/index.php/XScreenSaver#Automatically_lock_when_suspending.2Fsleeping.2Fhibernating

In the past, Fedora applied a similar approach for KDE (since then I switched
to XFCE).