Comment # 38 on bug 1084943 from Frank Kruger

(In reply to Jonathan Kang from comment #36)
> The reason why an error message show up firstly is when NM asks for secrets,
> sddm
> session hasn't quitted yet.
> ... 
> The possible improvement to this issue I can think of is to disable WPS
> push-button method by default to reduce the duration of the first activation
> process.
> 
> Thought?
Isn't disabling wps by default brute force? What about those people using it?
Since the issue seems to be due to a race between NM (asking for secrets) and
sddm (not finished yet), as you wrote, I doubt that wps is the main culprit.