rc.local doesn't run on startup

Question

I know this question has been asked a lot of times already, and I think I might have tried everything suggested on the internet, but I just can't get it running

/etc/rc.local:

#!/bin/sh -e

while :
do

    alsactl restore
    if [ $? = 0 ]
    then
        echo "alsactl restored" >> ~/Desktop/rc.log
        break
    else
        echo $?
    fi
    sleep 2

done

exit 0

permissions are

$ ls -l /etc/rc.local
-rwxr-xr-x 1 root root 855 Jul   5 17:05 /etc/rc.local

any ideas?

Ubuntu 14.04