Hello,
I am suffering from the very same problem. When my Thinkpad E540 resumes from hibernation or from sleep, the adapter cannot connect to my WiFi router.
After reading all the posts here I have tried something else. Somebody wrote that disabling and enabling the Wi-Fi adapter would solve the problem, but that is a little bit inconvenient to make this disable/enable thing manually.
The solution is to create a scheduled task triggered by an event (Source: Power-Troubleshooter; Event ID: 1 - that is the system resumed from a low power state).
I have defined to consecutive tasks as follows:
netsh interface set interface "Wi-Fi" admin=disable
netsh interface set interface "Wi-Fi" admin=enable
It works, at least for me. I hope it will for others as well.
Of course this is not a real solution, only a workaround. But it calms me down to be patient until Intel finds the real solution.
Regards, Kalman