0xbb/macbook-mute.sh
Last active May 29, 2019

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Turn off Macbook startup sound - Linux

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macbook-mute.sh

      
        #!/bin/bash
      
        printf "\x07\x00\x00\x00\x00" > /sys/firmware/efi/efivars/SystemAudioVolume-7c436110-ab2a-4bbb-a880-fe41995c9f82

Bios-Marcel commented Jan 9, 2019

Hey, this doesn't work, since not even root has the permission to change these :/

Could you lend your help here?

jradmacher commented Mar 31, 2019

If someone else finds this Gist: You need to remove the immutable flag before writing.
chattr -i /sys/firmware/efi/efivars/SystemAudioVolume-7c436110-ab2a-4bbb-a880-fe41995c9f82

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