Bug 405355

Summary: Bypass of password login in kscreenlocker after resuming screens from energy save mode.
Product: [Unmaintained] kscreenlocker Reporter: Oskar Roesler <o.roesler>
Component: generalAssignee: Plasma Bugs List <plasma-bugs-null>
Status: RESOLVED WORKSFORME    
Severity: critical CC: bshah, kde, nate, spinnix
Priority: VHI    
Version First Reported In: unspecified   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
See Also: https://bugs.kde.org/show_bug.cgi?id=416344
Latest Commit: Version Fixed/Implemented In:
Sentry Crash Report:

Description Oskar Roesler 2019-03-11 17:02:43 UTC 
SUMMARY
After resuming and screens get on (no standby), you get a similar problem like on this issue (https://bugs.kde.org/show_bug.cgi?id=360421), but without any heavy CPU load. Switching to another tty and back and you're logged in without typing a password.

STEPS TO REPRODUCE
1. Wait that your screens get locked and off.
2. Resume from energy save mode. Probably, like in the other named issue, mouse and keyboard will both work, but don't get recognized by plasma.
3. Switch to a diffrent tty and back to the tty of xserver

OBSERVED RESULT
You're logged in without typing in the password.

EXPECTED RESULT
You see the login screen and get asked for password when using mouse or typing.


SOFTWARE/OS VERSIONS
Linux/KDE Plasma: Arch Linux kernel 5.0.0-1
(available in About System)
KDE Plasma Version: 5.15.2
KDE Frameworks Version: 5.55.0
Qt Version: 5.12.1

ADDITIONAL INFORMATION
Similarities with this bug: https://bugs.kde.org/show_bug.cgi?id=360421
Video of Bug: https://ipfs.io/ipfs/QmcuiLnyWHHqLmuhSi3GGyiRZn7H3ZLZcqbMBwHZr4pyDc
Comment 1 Oskar Roesler 2019-03-11 17:10:49 UTC 
kscreenlocker 5.15.2-1
Comment 2 Oskar Roesler 2019-03-17 09:57:51 UTC 
I can't reproduce this behavior with kscreenlocker 5.15.3-1. 
Can someone confirm this?
Comment 3 spinnix 2020-01-17 02:56:58 UTC 
I did it.

Watch my bug report.

https://bugs.kde.org/show_bug.cgi?id=416344
Comment 4 David Edmundson 2020-02-20 18:55:52 UTC 
works for oskar, lets only have spinnix's