I am having wifi issues on a 1st gen Lenovo Yoga with a Realtek chipset. The wifi will show connected in the taskbar, but no connection to anywhere else on the wifi network or the internet is available. Rebooting doesn't help. Disconnect and reconnect doesn't help. No other wifi device in the house has an issue at the same time and there are MANY devices.
Then the connection restores seemingly at random intervals and will stay good for a while.
I read on the Microsoft based Win10 forums that there is a common issue with various RealTek WIFI chipsets, but no solution or workaround.