Bug 322582

Summary: Kscreenlocker takes long time to actually lock, seg faults
Product: kscreensaver Reporter: Nick <nlozo>
Component: locker-qmlAssignee: Plasma Bugs List <plasma-bugs>
Status: RESOLVED UNMAINTAINED    
Severity: crash CC: mgraesslin
Priority: NOR    
Version: 4.10.4   
Target Milestone: ---   
Platform: Fedora RPMs   
OS: Linux   
Latest Commit: Version Fixed In:
Attachments: Strace of kscreenlocker_greet

Description Nick 2013-07-19 17:07:27 UTC 
On any of our Dell workstations(E5400, 4gb RAM) when trying to lock the screen it will freeze up the system. I tried it from the command line which results in a seg fault. My newer laptop (Lenovo t430u) will actually work, but takes a while even on this high end system. The strace of process shows a inoridinate amount of access calls to files that are non exisistent, and according to kde is deprecated. (Such as the case when accessing directories like /home/user/.kde/share/locale/en_US/LC_SCRIPTS/kdelibs4/kdelibs4.js.

If that has anything to do with it I don't know, but what eventually happens is the process segfaults, and will continously respawn in a never ending cycle. This brings the system to a halt and not even SSH'ing in to killing the process will do anything. I have about 500 of these in production so this a block for me to rollout KDE.

Reproducible: Always

Steps to Reproduce:
1. Start KDE
2. Hit CTRL-ALT-L or Run process from CLI
3. Box Freezes/Seg faults
Actual Results:  
Process segfaults restarts and KDE freezes although you can get in with SSH.

Expected Results:  
Screen Locks

The image is via NFS as well as the Home directory is a NFS mount.

Workstations are Vostro 230, E5400 4GB RAM.
Comment 1 Nick 2013-07-19 17:09:32 UTC 
Created attachment 81202 [details]
Strace of kscreenlocker_greet

exact command "strace -vvvv /usr/libexec/kde4/kscreenlocker_greet --nocrashhandler"
Comment 2 Nick 2013-08-05 19:03:38 UTC 
With the lack of help. I had to replace it with xscreensaver.
Comment 3 Martin Flöser 2015-01-23 12:26:38 UTC 
Sorry for the delay in answering. We actually need the back trace of the crashing process in order to investigate. But I highly suspect nfs mounts to be the cause for the problems here.
Comment 4 Andrew Crouthamel 2018-09-04 04:06:08 UTC 
Hello! Sorry to be the bearer of bad news, but this project has been unmaintained for many years and I will be closing this bug. Please re-test and file a new bug with kscreenlocker if the issue persists.