Problema resolvido! Eu fiz algumas pesquisas e encontrei um script para atualizar o sistema ALSA. link
Depois de baixar o script, você precisa dar permissão de execução, por exemplo
chmod u+x alsa_setup.sh
#!/bin/sh
# This script will recompile the ALSA drivers for Ubuntu
# This procedure was gotten from
# https://help.ubuntu.com/community/HdaIntelSoundHowto
#
# Authored by Bob Nelson [email protected]
#
# This script updated 9/6/2007
script_name="alsa_setup.sh"
# Script must run as root
if [ $USER != "root" ]; then
echo "You need to run this script as root."
echo "Use 'sudo ./$script_name' then enter your password when prompted."
exit 1
fi
# Install the required tools
apt-get -y install build-essential ncurses-dev gettext
# Install your kernel headers
apt-get -y install linux-headers-'uname -r'
# Change to users home folder
cd ~
# Get the files from www.stchman.com
wget http://www.stchman.com/tools/alsa/alsa-driver-1.0.16.tar.bz2
wget http://www.stchman.com/tools/alsa/alsa-lib-1.0.16.tar.bz2
wget http://www.stchman.com/tools/alsa/alsa-utils-1.0.16.tar.bz2
# make a new folder
mkdir -p /usr/src/alsa
# Change to that folder
cd /usr/src/alsa
# Copy the downloaded files to the newly made folder
cp ~/alsa* .
# Unpack the tar archive files
tar xjf alsa-driver*
tar xjf alsa-lib*
tar xjf alsa-utils*
#Compile and install alsa-driver
cd alsa-driver*
./configure --with-cards=hda-intel --with-kernel=/usr/src/linux-headers-$(uname -r)
make
make install
# Compile and install alsa-lib
cd ../alsa-lib*
./configure
make
make install
# Compile and install alsa-utils
cd ../alsa-utils*
./configure
make
make install
# Remove the archives as they are no longer needed
rm -f ~/alsa-driver*
rm -f ~/alsa-lib*
rm -f ~/alsa-utils*
# Add the following line to the file, replacing '3stack' with your model
echo -e '\n' >> /etc/modprobe.d/alsa-base
echo "options snd-hda-intel model=3stack" >> /etc/modprobe.d/alsa-base
# Reboot the computer
reboot
Ainda recebo o erro oss4. Mas o som funciona!