It is according to the protocol: "If 'options' contains PresentOptionAsync, and the 'target-msc' is less than or equal to the current msc for 'window', then the operation will be performed as soon as possible, not necessarily waiting for the next vertical blank interval."
Signed-off-by: Jammy Zhou <jammy.z...@amd.com> --- present/present.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/present/present.c b/present/present.c index beb4ff0..5900c22 100644 --- a/present/present.c +++ b/present/present.c @@ -871,7 +871,7 @@ present_pixmap(WindowPtr window, xorg_list_add(&vblank->event_queue, &present_exec_queue); vblank->queued = TRUE; - if ((pixmap && target_msc >= crtc_msc) || (!pixmap && target_msc > crtc_msc)) { + if (target_msc > crtc_msc) { ret = present_queue_vblank(screen, target_crtc, vblank->event_id, target_msc); if (ret == Success) return Success; -- 1.9.1 _______________________________________________ xorg-devel@lists.x.org: X.Org development Archives: http://lists.x.org/archives/xorg-devel Info: http://lists.x.org/mailman/listinfo/xorg-devel