Using a Dell Latitude E7240 with Windows 7 64-bit, Intel Dual Band Wireless AC-7260 and Intel HD4600 graphics to connect to a Sony KDL-46W900A TV, display mirroring works very well for +/- 10 minutes before losing the connection.
I can reconnect, but the connection is lost again after a few minutes.
The laptop is connected to the mains power and I don't believe any power saving features are being activated.
As far as I can tell, I have the latest software on both the laptop and the TV - is there some way to prevent the constant disconnections?