UbuntuHelp:UbuntuLTSP/DisablePCSpeaker

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https://help.ubuntu.com/community/UbuntuLTSP/DisablePCSpeaker

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This page is dedicated to disabling the PC speaker on LTSP thin-clients. PC speakers can be very annoying, especially upon login when users attempt to use the numeric keypad and the NumLock key isn't enabled, causing a system beep. Multiply this by 35 thin-clients in a computer lab, and you have enough reason to jump off a cliff. ;) We can disable LTSP client PC speakers by creating a file that will blacklist the pcspkr kernel module from loading upon thin-client bootup. First, create a file: /opt/ltsp/arch/etc/modprobe.d/blacklist-pcspkr:

sudo vim /opt/ltsp/arch/etc/modprobe.d/blacklist-pcspkr

blacklist-pcspkr:

# Blacklists PC Speaker module (pcspkr)
blacklist pcspkr

Update the client chroot image:

sudo ltsp-update-image

Reboot thin-clients, and enjoy a beepless LTSP environment.