Love x2go, but one significant annoyance.
If I sleep my client without first shutting down x2go, then when it wakes, desktop is unresponsive until x2go timesout, and asks whether to terminate.
I don't know what x2go is doing that freezes desktop, but I don't think this should happen.
I'm using kde on client side. I saw this behavior for some time, both on kde4 (fedora f22) and now on kf5 (fedora 23).