I have seen searched a lot about sharing internet of computer to Android device (when the computer is connected to the internet via wi-fi not lan- Ethernet)
here are some of the links that helped me, But I have not got a way to figure out the way.
I have also tried out reverse-tethering via usb but it seems to be working only if I am connected via Ethernet not over wi-fi
My computer has single wi-fi card
can I create a hot spot or share internet via any means to my android phone
How to share internet to other devices through wifi:
I'll suggest you the method that worked for me and my friends.
install kde-nm-connection manager. details on how to install & setup
This should work. If not do as follows:
sudo apt-get install linux-firmware-nonfree
After installing this you can try to setup the hotspot again.