How to turn off the PC Speaker in Ubuntu
In addition to my previous post if you want to turn off the system speaker in Ubuntu just type the following in a terminal window.
echo "blacklist pcspkr" | sudo tee -a /etc/modprobe.d/blacklist
When you reboot your computer the system beep should be disabled. To avoid a reboot you can just run:
sudo modprobe -r pcspkr
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