On Wed, Apr 30, 2008 at 8:39 PM, Alex Deucher <<a href="mailto:alexdeucher@gmail.com">alexdeucher@gmail.com</a>> wrote:<br><div class="gmail_quote"><br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;"> <div class="Ih2E3d"> >       * Only wait if the window isn't redirected (backing pixmap is the<br> >         screen pixmap)<br> <br> </div>yeah, as you said, any rendering to the front buffer should wait for<br> vblank.  I may play around with it a bit if I have time, but<br> unfortunately, I seem to be unable to notice tearing generally.  Do<br> you have any good tips or content that would make it easier to notice?<br> </blockquote><div><br>Yes, I generally use this free calibration DVD:<br><a href="http://merifon.altervista.org/TestDVD.html">http://merifon.altervista.org/TestDVD.html</a> (200 Mb, direct link: <a href="http://www.isaneri.it/bg/TestDVD1_08.zip">http://www.isaneri.it/bg/TestDVD1_08.zip</a>)<br> </div></div><br>If you extract it and play VTS_04_1.VOB, at the end you find a fast horizontal moving patter, which evidently shows an horizontal tearing. <br>