i think we have the same problem i just got my mark 5 a few days ago and i can't get wlan1 to enable via the Network tab, i have also checked everything like in the first post of this thread there in no config for the second radio what so ever it don't show up at all in wifi manager, so i can't use (client mode) i really would like help on this or would i have to send it back to hak5 for a replacement ?
didn't help forgot this will post screen shot and anything else i can think of