> Are you able to ping your laptop from AP to see similar statistics? Or > ping OpenBSD laptop from other clients associated with AP?
Yes, statistics are similar... (ping OpenBSD->Linux 70-73% success, Linux->OpenBSD 70-73% success). > I suppose that there's more operating systems on clients in your > network and they don't have these issues, right? If I ping gateway from laptop where I have Linux ... I have 100% success. Problem is only in OpenBSD laptop. (I already had FreeBSD at the same laptop (same AP) and wifi worked correctly.)

