I have a HP mini 210 4000 laptop. After re-installing dual boot Windows 7 and Ubuntu Mate 16.04, I decided to tweak a little on the audio of my Ubuntu Mate. I searched in the net for a IDT High Definition Audio codecs driver for linux and I found one at the Realtek website.
I downloaded the driver “0001-LinuxPkg 5.18rc8.tar.bz2”. And I followed the instructions on how to install it. I was very careful to follow the instruction exactly but when I got to the command
make install there were errors. I then rebooted Ubuntu and I was dismayed there was no sound. I looked in the sound preferences, click the tab Hardware and to my dismay found nothing - no hardware just blank. On the tab Output it says “Dummy Output stereo”
Now kindly help me how to restore back the default Audio driver of Ubuntu Mate 16.04. thank you in advance