fedora27,testing-repos, plasma 5.11.4, k-frameworks 5.41 I have plasma5 running in an vncserver-process which is most of the time, idle. After using it for some while with vncviewer and killing the vncviewer window, the kscreenlocker_greet process consumes up to 30% cpu time (on one cpu core) - which is waaay too much! The screenlocker is only displaying a static image, no slideshow
Please state your Qt version. Also can you run the attached case with qmlscene from comment #1 here. https://bugs.kde.org/show_bug.cgi?id=386846 and tell me if you get an error there. finally can you run kscreenlocker_greet with both QSG_RENDER_LOOP=basic and =threaded
qt is still on 5.9.2 according to https://bugs.kde.org/show_bug.cgi?id=386846, errors appear also with qt 5.10.5. My peculiar problem can be worked around by killing the vnc session and restarting the vnc server. Then (without logging in at all) the cpu consumption is about 10% (on a 16core machine), so this is ... quite ok for me at the moment...
The reference to 5.10.5 was for the Plasma version. Qt only released version 5.10.0, and you would need to test this version.
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Dear Bug Submitter, This bug has been in NEEDSINFO status with no change for at least 30 days. The bug is now closed as RESOLVED > WORKSFORME due to lack of needed information. For more information about our bug triaging procedures please read the wiki located here: https://community.kde.org/Guidelines_and_HOWTOs/Bug_triaging Thank you for helping us make KDE software even better for everyone!
I have a similar problem on a regular X server without VNC. kscreenlocker_greet's CPU load is somewhere between 15% and 50% most of the time (these are percentages of 1 hyper-threaded core capability). OS: Fedora 28 Plasma 5.13.5 Qt 5.11.1 KF 5.52.0
(In reply to Alexander Potashev from comment #6) > I have a similar problem on a regular X server without VNC. > kscreenlocker_greet's CPU load is somewhere between 15% and 50% most of the > time (these are percentages of 1 hyper-threaded core capability). > > OS: Fedora 28 > Plasma 5.13.5 > Qt 5.11.1 > KF 5.52.0 Shall I create a new bug report for my case?
Search bugzilla first, there's a thread where switching to the software renderer fixes it.
You probably meant https://bugs.kde.org/show_bug.cgi?id=347772 Well, can't reproduce at the moment, will report next time I detect high CPU load. Thanks!
That's the one. Report back if it helps or not, I might try and automate the detection.