Bug 405219

Summary: Screen locker 'unable to unlock, use loginctl instead' randomly when system is locked
Product: [Plasma] kscreenlocker Reporter: s1r51ckb01
Component: greeterAssignee: Plasma Bugs List <plasma-bugs>
Severity: normal CC: bhush94, bugseforuns, kde, KDE
Priority: NOR    
Version: unspecified   
Target Milestone: ---   
Platform: Arch Linux   
OS: Linux   
Latest Commit: Version Fixed In:
Attachments: Logfile

Description s1r51ckb01 2019-03-08 14:42:46 UTC
Similar to bug:

After about one hour of screen lock the message of unlocking via loginctl appears.

OS: Arch Linux 
Kernel: x86_64 Linux 4.14.90-1-lts
Uptime: 7h 22m
Packages: 1341
Shell: zsh 5.7.1
Resolution: 3840x1080
DE: KDE 5.55.0 / Plasma 5.15.2
WM: KWin
GTK Theme: Breeze [GTK2/3]
Icon Theme: breeze
Font: Noto Sans Regular
CPU: Intel Core i7-4600U @ 4x 3.3GHz 
GPU: Mesa DRI Intel(R) Haswell Mobile 
RAM: 4229MiB / 7856MiB
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My setup is 2 monitor 1920x1080 (one with hdmi - one with mini display port)

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Comment 1 s1r51ckb01 2019-03-08 14:44:05 UTC
Created attachment 118648 [details]

Log in attachment
Comment 2 David Edmundson 2019-03-08 14:50:36 UTC
That will happen if kscreenlocker_greet has crashed. 

In any case, I'll need the crash dump of that. 

Your attached log is of plasmashell, a different process. 
Apparently in response to a screen changing?
Comment 3 s1r51ckb01 2019-03-08 14:55:05 UTC
Hi David, thanks for the response!
I do not make any changes, the problem appears after about an hour of lock screen.
You can direct me on which log to take?
the only error trace I see with journalctl is the attached one
Comment 4 s1r51ckb01 2019-03-08 14:58:05 UTC
Created attachment 118649 [details]
Comment 5 David Edmundson 2019-03-08 16:02:15 UTC
Run this /usr/lib64/libexec/kscreenlocker_greet --testing and see if it crashes.

(that path might be subtly different on your distro, please look for that executable accordingly)

If it does crash, hopefully we'll get a drkonqi crash dialog, failing that, please run 

gdb /usr/lib64/libexec/kscreenlocker_greet --testing
and type "bt" when in the gdb prompt when it crashes.
Comment 6 s1r51ckb01 2019-03-11 09:06:33 UTC
Hi David,
i run both commands but did not return errors
Comment 7 Christoph Feck 2019-03-24 12:22:47 UTC
New information was added with comment #6; changing status for inspection.
Comment 8 s1r51ckb01 2019-04-09 09:05:40 UTC
Hi guys, 
after having done some updates after the opening of this task, the described problem has not been repeated. I believe we can close it here
Comment 9 Patrick Silva 2019-04-17 01:01:42 UTC
closing as per comment 8