I installed ubuntu 16.04 on my lenovo yoga 13, and I found my laptop wifi always can't work after reboot. I had to re-enable the wifi hardware in my windows system, because it show an network error trayicon in my statusbar. Then I reboot to linux, wifi works but unstable.
The bluetooth works normally, but wifi and bluetooth can't work together.

Then I try to install the wifi driver and bluetooth driver in this repository, but It had no improvement.

The linux kernel is 4.4.