On Thu Apr 3 03:32:06 PDT 2014, Carlos Rafael Giani wrote:
>
This X11 vsync problem has been bugging several people, and to date,
there is no proper solution (other than to use framebuffer directly
instead, or switch to Wayland).
Eric Nelson mentioned details about this, as well as a possible
workaround. I appended his email here:
=================================================
I haven't had much of a chance to look into this, but just found
this in "Freescale_XServer_Video_Driver_Users_Guide.pdf" in the
documents package of the documentation package of the 3.10.17-ga
release:
https://community.freescale.com/docs/DOC-100787
1.7 Tearing
XServer (and early Microsoft Windows) does not support double
buffering for the screen. There will be a copy from off-screen
buffer to target on-screen area (or direct rendering to
on-screen). The operation cannot be completed in the blank time
of the display, and the IPU cannot provide an ideal VSYNC
signal.
Therefore, there will be tearing.
To remove tearing, a GLES compositor is needed. This tearing
free feature will be described in next release.
Regards,
Eric
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