[kscreenlocker] [Bug 371775] New: The kscreenlocker_greet process is not found after several hours of idle-time.

2016-10-28 Thread Arvid Fahlander
https://bugs.kde.org/show_bug.cgi?id=371775

Bug ID: 371775
   Summary: The kscreenlocker_greet process is not found after
several hours of idle-time.
   Product: kscreenlocker
   Version: unspecified
  Platform: Gentoo Packages
OS: Linux
Status: UNCONFIRMED
  Keywords: reproducible
  Severity: major
  Priority: NOR
 Component: general
  Assignee: plasma-b...@kde.org
  Reporter: arvut_ar...@hotmail.com
CC: bhus...@gmail.com, mgraess...@kde.org
  Target Milestone: ---

Created attachment 101846
  --> https://bugs.kde.org/attachment.cgi?id=101846&action=edit
The tarball containing the ebuild for currently compiled kscreenlocker
mentioned in the bugreport

This results in frozen process-output (of kscreenlocker_greet) at TTY7 where X
session is running. Currently logged in user(s) cannot reach their sessions and
SDDM has to be killed to re-initiate login(s) from TTY7.


kscreenlocker: 

DIST kscreenlocker-5.8.2.tar.xz 108036 SHA256
e17abef1b648a6ed77d5646d3378a44273ddd9d4a06c2747fbbf2a4f0a145e55 SHA512
75c61ae4187808382ebf4db4d55c056445163ec85edfc202a84c835b6259f09d2e11ed3d68c6f4afbcdc9bf35c8b3e20efe00433e992a0f08ccfd01d2bd7d7e0
WHIRLPOOL
f2798a8147c6c1d0861accbef8091adb9056cfdea6e3417f31d65dfec6fe4bd72a78cbdd4443b8ee7b244837bc5ed4aec717e92de4c30f0d43af0d376b6f0b7d

KDE: 5.27.0
Qt: 5.6.2
plasmashell 5.8.2

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[kscreenlocker] [Bug 371775] The kscreenlocker_greet process is not found after several hours of idle-time.

2016-10-28 Thread Arvid Fahlander
https://bugs.kde.org/show_bug.cgi?id=371775

--- Comment #2 from Arvid Fahlander  ---
(In reply to Martin Gräßlin from comment #1)
> is kscreenlocker_greet still running? If yes can you try to gdb in and get a
> backtrace

I could not find any process with kscreenlocker in the name, I tried to find it
using 'ps aux | grep locker', so I'd say that's a no. It looks like the process
has frozen and died, clock had stopped at 04:43:23 this morning when I returned
to desktop around 08:00.

This behaviour of kscreenlocker has been confirmed by another freenode user in
the gentoo community, and incident has occured twice for me.

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[kscreenlocker] [Bug 371775] The kscreenlocker_greet process is not found after several hours of idle-time.

2016-10-28 Thread Arvid Fahlander
https://bugs.kde.org/show_bug.cgi?id=371775

--- Comment #4 from Arvid Fahlander  ---
(In reply to Martin Gräßlin from comment #3)
> I think there is a bigger problem than the freezing of the locker.
> 
> As the process is no longer running the screen should not show the window
> any more. It must be removed if the process dies. And that's the job of the
> X server.
> 
> If kscreenlocker_greet crashes ksmserver will restart it. So that there is
> always a locker. If the restart fails for four times the lock screen
> architecture goes into emergency mode. The lock screen is replaced by a
> black screen with a message on how to unlock the screen with loginctl.
> 
> Given that we should either have the process of the warning message. As both
> is not the case I fear the problem is deeper in the stack.
> 
> If it happens the next time please try to get some more information about
> the system state. Check dmesg for error message (e.g. reported coredumps,
> hung gpu, etc). Check /var/log/Xorg.0.log for errors. Check top for whether
> a process is running amok.
> 
> In case you are using logind you can also try to unlock the session with:
> loginctl unlock-sessions

I am not using systemd, my gentoo runs on openrc, so no loginctl is present in
my setup. When programs crash I usually see an entry in /var/log/messages
(syslog) and get a core file containing the crashdump, I did not find either
for kscreenlocker_greet.

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