Reports

I discovered from a Linux Mint Forum topic that what I was missing is making sure the current user had sufficient permissions (the error messages gave me no indication that it was a permission issue, but turns out, it was).

I moved the command into a Bash script named setVolume.sh (making sure it has the correct permissions with chmod), with the user myuser being part of the group for /usr/bin/amixer:

sudo su - myuser
amixer -c 3 set PCM 50%

Then, I changed Go code to:

package main

import (
    "fmt"
    "log"
    "os"
    "os/exec"
)

func main() {
    setVolumeCommand := exec.Command("/bin/sh", "./setVolume.sh")
    setVolumeCommand.Stdout = os.Stdout
    setVolumeCommand.Stderr = os.Stderr
    setVolumeError := setVolumeCommand.Run()
    if setVolumeError != nil {
        log.Fatal(setVolumeError)
    }
}

Thanks for helping me figure this out!

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