Has this issue been resolved? I am experiencing the same thing. I was able to connect to my TV (Sharp SQ15U, through Miracast) and display my desktop on the TV, but only when I have disabled the connection to my router before restarting. Once I reconnect to the router the connection to the TV is broken. Here are my specs:
Model: Lenovo Thinkpad X230
Operating System: Windows 7 64bit
Processor: Intel Core i7 3520M @2.90GHz
Wireless adapter: intel 82579LM (Driver 12.10.29.0 built by WinDDK)
Display: Intel HD Graphics 4000
Your help is appreciated