Bug 421320

Summary: kscreenlocker does not work properly
Product: [Plasma] kscreenlocker Reporter: christian.lange
Component: generalAssignee: Plasma Bugs List <plasma-bugs>
Status: RESOLVED DUPLICATE    
Severity: critical CC: bhush94, katyaberezyaka, nate, psychonaut
Priority: NOR    
Version: unspecified   
Target Milestone: ---   
Platform: Neon   
OS: Linux   
Latest Commit: Version Fixed In:
Sentry Crash Report:

Description christian.lange 2020-05-11 08:57:41 UTC 
SUMMARY
I use latest KDE Neon. When the system is under some load or paging while suspending, it can rarely happen that the screen is not locked when the system is resumed and you can see the unlocked screen for maybe half a second. This is a security issue, cause with a camera you could be able to capture the screen before it is locked.
I think the screenlocker loads to slow in some cases and the system is suspended before the screenlocker is active and it completes to load after the resume.  

STEPS TO REPRODUCE
1. Slow the system down by using all the memory and suspend to RAM or use a system with slow hardware.
2. Resume the system and in some cases the screen is not locked for a short time
3. 

OBSERVED RESULT
screen is not locked every time you suspend the system

EXPECTED RESULT
the screen should always be locked after resume

SOFTWARE/OS VERSIONS
latest KDE Neon

ADDITIONAL INFORMATION
Comment 1 Tristan Miller 2020-09-07 09:21:06 UTC 
Possible duplicate of Bug 415362.
Comment 2 Nate Graham 2021-06-21 22:44:22 UTC 

*** This bug has been marked as a duplicate of bug 316734 ***