Debian: dmesg output contains “Error: Driver ‘pcspkr’ is already registered, aborting…”


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Here is what’s transpiring: the boot sequence attempts to load two different drivers for the integrated PC speaker. To solve the problem install alsa-base package:
aptitude install alsa-base

And then execute the following command:
echo blacklist snd-pcsp >> /etc/modprobe.d/alsa-base-blacklist