Hi,
@SGaist
@Kent-Dorfman

I tried to google "QUdpsocket priority",
I got many result that discribe my problem but without soultion.

Many peopele have the same problem.

My felling is there is some problem. But i dont have enough knowledge to debug it.

@MaxYaffe What Qt version did you install?
Do you use QtCreator?
Does that project already contain some code from you or was it just created?