https://bugs.freedesktop.org/show_bug.cgi?id=97260
--- Comment #17 from nadro-linux@wp.pl --- Thanks for your help, when I removed followind line: "adev->ddev->mode_config.async_page_flip = true;" from all three files "dce_v8_0.c", "dce_v10_0.c", "dce_v11_0.c" (I use AMDGPU driver) a performance is fine again!