Bug 104847

Summary: GLX apps are swapping at the wrong refresh rate under Xwayland.
Product: xorg Reporter: Daniel van Vugt <daniel.van.vugt>
Component: Server/GeneralAssignee: Xorg Project Team <xorg-team>
Status: RESOLVED DUPLICATE QA Contact: Xorg Project Team <xorg-team>
Severity: normal    
Priority: medium    
Version: 7.7 (2012.06)   
Hardware: Other   
OS: All   
Whiteboard:
i915 platform: i915 features:

Description Daniel van Vugt 2018-01-30 05:39:30 UTC 
My monitor runs at 59.95Hz and this is what I see:

Xwayland:

$ glxgears 
Running synchronized to the vertical refresh.  The framerate should be
approximately the same as the monitor refresh rate.
428 frames in 5.0 seconds = 85.552 FPS
300 frames in 5.0 seconds = 59.993 FPS
301 frames in 5.0 seconds = 60.006 FPS
301 frames in 5.0 seconds = 59.983 FPS
301 frames in 5.0 seconds = 60.016 FPS   WRONG
300 frames in 5.0 seconds = 59.999 FPS
300 frames in 5.0 seconds = 59.986 FPS
301 frames in 5.0 seconds = 60.004 FPS
301 frames in 5.0 seconds = 60.002 FPS
300 frames in 5.0 seconds = 59.998 FPS

$ weston-info | grep refresh
		width: 1920 px, height: 1200 px, refresh: 59.950 Hz,

Xorg:

$ glxgears 
Running synchronized to the vertical refresh.  The framerate should be
approximately the same as the monitor refresh rate.
481 frames in 5.0 seconds = 96.146 FPS
300 frames in 5.0 seconds = 59.952 FPS
300 frames in 5.0 seconds = 59.956 FPS
300 frames in 5.0 seconds = 59.943 FPS
300 frames in 5.0 seconds = 59.948 FPS   RIGHT
300 frames in 5.0 seconds = 59.953 FPS
300 frames in 5.0 seconds = 59.951 FPS
300 frames in 5.0 seconds = 59.949 FPS
300 frames in 5.0 seconds = 59.956 FPS
300 frames in 5.0 seconds = 59.947 FPS
300 frames in 5.0 seconds = 59.952 FPS
Comment 1 Daniel van Vugt 2018-01-30 05:41:50 UTC 

*** This bug has been marked as a duplicate of bug 103282 ***

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