md10.21 sound problem
I Have MD10.21.
It has been running trouble free for a while.
It has a sound card and Onboard pc speaker attached to mother board.
At present the sound for tv is coming from the Onboard pc speaker and sound card.
I tried to disable pc speaker by
and added it to /etc/modprobe.d/blacklist like this
Unfortunately the sound is still coming from both sound card and on board pc speaker.
What else do I need to do to disable the on board pc speaker.