Para não prescisar digitar o comando toda vez que ligar o computador, coloque o comando "alsa force-reload" no arquivo "/etc/re.local" antes do "exit 0"
sudo gedit /etc/rc.local
O arquivo deve ficar mais ou menos assim:
#!/bin/sh -e
#
# rc.local
#
# This script is executed at the end of each multiuser runlevel.
# Make sure that the script will "exit 0" on success or any other
# value on error.
#
# In order to enable or disable this script just change the execution
# bits.
#
# By default this script does nothing.
alsa force-reload
exit 0