On 13.07.2016 18:49, Rainer Hochecker wrote: > We have been using this for years now and did not observe issues you > mentioned. I would be surprised if a child window refreshes in a > different rate than the main window The Xorg driver decides which CRTC to synchronize with based on the window geometry. For a window with no visible geometry, it may choose a different CRTC than for the visible output window. In the case of DRI3, the Xorg Present extension code may even fall back to the fake CRTC in that case, which only generates a fake vblank event once every second. -- Earthling Michel Dänzer | http://www.amd.com Libre software enthusiast | Mesa and X developer _______________________________________________ dri-devel mailing list dri-devel@xxxxxxxxxxxxxxxxxxxxx https://lists.freedesktop.org/mailman/listinfo/dri-devel