Hi Dave, About this commit in xserver: https://cgit.freedesktop.org/xorg/xserver/commit/present/present.c?id=47bc7fcaa567b0d9e2627b4a21b112e96f81725b It disables present page flip after gpu screen attaches output to screen which affect hybrid GPU platform to get a smooth desktop. Do you have any plan how to solve this? Thanks, Qiang