Bug 324742

Summary:	kwin does not apply vsync on login
Product:	[Plasma] kwin	Reporter:	Nikos Chantziaras <realnc>
Component:	compositing	Assignee:	KWin default assignee <kwin-bugs-null>
Status:	RESOLVED DUPLICATE
Severity:	normal
Priority:	NOR
Version First Reported In:	4.11.1
Target Milestone:	---
Platform:	Gentoo Packages
OS:	Linux
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Nikos Chantziaras 2013-09-10 11:49:38 UTC

kwin doesn't apply vsync when logging in. The vsync checkbox is enabled in System Settings and the setting is stored correctly in kwinrc:

GLPreferBufferSwap=a

The method used doesn't matter (automatic, only when cheap, etc.) In order to activate vsync after logging in, I have to open the desktop effects settings, and change any random setting (doesn't have to be the vsync checkbox, which is already checked) and then click "apply".

This problem did not occur with KDE 4.10.97. It started with 4.11.0 and also exists in 4.11.1. My ~/.kde4 directory was created by 4.10.97.

Reproducible: Always

Steps to Reproduce:
1. Enable VSync in the Desktop Effects settings.
2. Reboot.
3. Login into KDE
Actual Results:  
Tearing when moving windows.

Expected Results:  
Tear-free animations due to VSync being enabled in the Desktop Effects settings.

X.Org server 1.14.2
Qt 4.8.5
NVidia driver 325.15 on a GTX 560 Ti
Kernel 3.10.11

Comment 1 Thomas Lübking 2013-09-10 11:51:51 UTC

https://git.reviewboard.kde.org/r/112368/

*** This bug has been marked as a duplicate of bug 322060 ***