[Bug 91416] vsync limits fps but still tearing in picture

[Bug 91416] vsync limits fps but still tearing in picture

[bugzilla-daemon]

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https://bugs.freedesktop.org/show_bug.cgi?id=91416

            Bug ID: 91416
           Summary: vsync limits fps but still tearing in picture
           Product: Mesa
           Version: 10.5
          Hardware: x86-64 (AMD64)
                OS: other
            Status: NEW
          Severity: normal
          Priority: medium
         Component: Drivers/Gallium/radeonsi
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: markusmitsch86@gmail.com
        QA Contact: dri-devel@lists.freedesktop.org

i experimented with the vblank_mode in various applications and saw that it
limits the fps to 60 hz as my monitor is but the picture is torn apart.

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[Bug 91416] vsync limits fps but still tearing in picture

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https://bugs.freedesktop.org/show_bug.cgi?id=91416

--- Comment #1 from Michel Dänzer <michel@daenzer.net> ---
Yes, in order to avoid tearing, you either need to run the (OpenGL) application
in fullscreen with page flipping enabled, or you need to use a compositing
manager which does the same thing. When using a compositing manager, enabling
DRI3 may help.

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[Bug 91416] vsync limits fps but still tearing in picture

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https://bugs.freedesktop.org/show_bug.cgi?id=91416

--- Comment #2 from Markus Mitsch <markusmitsch86@gmail.com> ---
running fullscreen nor changing any of the compositing options of my kubuntu
kde did make a difference. i really tried but could not find any way to fix
this so i thought it might be a bug.

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[Bug 91416] vsync limits fps but still tearing in picture

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https://bugs.freedesktop.org/show_bug.cgi?id=91416

--- Comment #3 from Michel Dänzer <michel@daenzer.net> ---
Without DRI3, you need to choose "Full scene repaints" in the kwin desktop
effects advanced settings for "Tearing Prevention (VSync)". With DRI3, you can
choose "Re-use screen content", which is more efficient.

You probably also want to enable "Suspend desktop effects for fullscreen
windows".

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[Bug 91416] vsync limits fps but still tearing in picture

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https://bugs.freedesktop.org/show_bug.cgi?id=91416

--- Comment #4 from Michel Dänzer <michel@daenzer.net> ---
If none of that helps, please attach your Xorg.0.log file.

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[Bug 91416] vsync limits fps but still tearing in picture

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https://bugs.freedesktop.org/show_bug.cgi?id=91416

--- Comment #5 from Michel Dänzer <michel@daenzer.net> ---
Oh, you also need to select OpenGL for compositing in kwin.

Also, with current xf86-video-ati Git, you can try Option "TearFree".

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[Bug 91416] vsync limits fps but still tearing in picture

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https://bugs.freedesktop.org/show_bug.cgi?id=91416

--- Comment #6 from Markus Mitsch <markusmitsch86@gmail.com> ---
ok. thanks for the tips, it works now.
i set the kwin compositor to: (option names may differ, i have a german
machine)

-scaling: precise
-opengl instead of xrender
-glx not egl
-vsync to automatic
-window thumbnails: only visible windows
-compositor not deactivated in fullscreen
-no color correction

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[Bug 91416] vsync limits fps but still tearing in picture

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https://bugs.freedesktop.org/show_bug.cgi?id=91416

Alex Deucher <alexdeucher@gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |NOTABUG

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