I’m having the same problem on Fedora 19, local accounts only, no NIS. Sometimes I can log in, sometimes I can’t. Really intermittent.
Also, when I do manage to connect, it keeps asking me every time what I want to do about the audio device, pass through or not.
VirtualNobody, this seems to be a different problem. I’ve opened a new topic: https://www.nomachine.com/forums/forums/topic/intermittent-login-on-fedora-19