cat > /etc/udev/rules.d/40-alsa.rules << "EOF"
# /etc/udev/rules.d/40-alsa.rules

# When a sound device is detected, restore the volume settings
KERNEL=="controlC[0-9]*", ACTION=="add", RUN+="/usr/sbin/alsactl restore %n"
EOF
chmod -v 644 /etc/udev/rules.d/40-alsa.rules