<html><head></head><body>It tears in full screen with and without compositing in xfce <div class="gmail_quote">On 11 October 2017 09:40:59 BST, "Michel Dänzer" <michel@daenzer.net> wrote:<blockquote class="gmail_quote" style="margin: 0pt 0pt 0pt 0.8ex; border-left: 1px solid rgb(204, 204, 204); padding-left: 1ex;"> <pre class="k9mail">On 10/10/17 07:50 PM, Anton Ivanov wrote: <blockquote class="gmail_quote" style="margin: 0pt 0pt 1ex 0.8ex; border-left: 1px solid #729fcf; padding-left: 1ex;"> Package: xserver-xorg-video-radeon Version: 1:7.8.0-1+b1 Severity: important Dear Maintainer, Radeon (and amdgpu for that matter) in stretch no longer match frames to vsync correctly. This is observable with vdpau, opengl and plain xvideo. This used to work correctly in jessie so this is a recent regression. This is also observable in both full screen and windowed mode. The bottom ~5-10% of the picture updates on the wrong vsycn which is clearly visible especially in action sequences and animation. Tested with vlc, mplayer, xine and other software in a variety of output modes. I think I have eliminated other possible common factors leaving the video driver (and/or firmware) the most likely culprit. </blockquote> The only possibilities for reliably avoiding tearing in Xorg have always been: 1. Using a compositing manager which uses OpenGL for rendering 2. Running an application in fullscreen, using page flipping (i.e. the application must use something like OpenGL / VDPAU / VA-API / ... for rendering / presentation, but not something like XVideo or even pure X11) 3. Enabling TearFree Note that 1.+2. are not sufficient when using rotation or other transforms via the RandR extension. Does your setup fall under any of these cases? If not, you may just have gotten lucky before. </pre></blockquote></div> -- Sent from my Android device with K-9 Mail. Please excuse my brevity.</body></html>