Comment 117 for bug 755841

(In reply to comment #72)
> Just as an update from the past post.
>
> Unfortunately, all my attempts for fixing this properly have failed so far, the
> hardware does not wants to collaborate with the software for inter-ring
> synchronization.
>
> So the workaround I used previously still applies - I need to disable
> compositing and use either vaapi or gl rendering, which perform vsync'ed screen
> updates.

> This way, I see no tearing.
Please, see (In reply to comment #72)
> Just as an update from the past post.
>
> Unfortunately, all my attempts for fixing this properly have failed so far, the
> hardware does not wants to collaborate with the software for inter-ring
> synchronization.
>
> So the workaround I used previously still applies - I need to disable
> compositing and use either vaapi or gl rendering, which perform vsync'ed screen
> updates. This way, I see no tearing.

> This way, I see no tearing.
Please, take a look at Comment 6 in this bug
https://bugs.freedesktop.org/show_bug.cgi?id=43674
I have tearing on tearing test 720x406 video file both via vaapi and gl without compositing.