The day before yesterday I upgraded my OS from Ubuntu 11.10 to 12.04. And I was able to hear sound from my "DELL VOSTRO - 3400" Laptop for 24 hours only.
But after that sound is coming through the headset only, not through speakers.
I searched for solution and followed the instruction given in the Sound troubleshooting help page.
I have run the following commands:
sudo add-apt-repository ppa:ubuntu-audio-dev/ppa
sudo apt-get update
sudo apt-get dist-upgrade
sudo apt-get install linux-sound-base alsa-base alsa-utils gdm ubuntu-desktop linux-image-`uname -r` libasound2
sudo apt-get -y --reinstall install linux-sound-base alsa-base alsa-utils gdm ubuntu-desktop linux-image-`uname -r` libasound2; killall pulseaudio
rm -r ~/.pulse*
sudo usermod -aG `cat /etc/group |
grep -e '^pulse:' -e '^audio:' -e '^pulse-access:' -e '^pulse-rt:' -e '^video:' |
awk -F: '{print $1}' | tr '\n' ',' | sed 's:,$::g'` `whoami`
wget -O alsa-info.sh http://www.alsa-project.org/alsa-info.sh && chmod +x ./alsa-info.sh && ./alsa-info.sh
bash alsa-info.sh --stdout
# resulted in different driver version: 1.0.24 (which actually should be 1.0.25)
sudo apt-add-repository ppa:ubuntu-audio-dev/alsa-daily;sudo apt-get update;sudo apt-get install alsa-hda-dkms.
cat /proc/asound/{version,cards,devices,hwdep,pcm,seq/clients}
sudo rm /etc/asound.conf
sudo rm -r ~/.pulse ~/.asound*
sudo rm ~/.pulse-cookie
sudo apt-get update
sudo apt-get install aptitude
sudo aptitude install paman gnome-alsamixer libasound2-plugins padevchooser libsdl1.2debian-pulseaudio
sudo lshw -short
ls -lart /dev/snd
cat /dev/sndstat
lspci -nn
lsusb
sudo which alsactl
sudo fuser -v /dev/dsp /dev/snd/*
dpkg -S bin/slmodemd
dmesg | egrep 'EMU|probe|emu|ALSA|alsa|ac97|udi|snd|ound|irmware'
sudo /etc/init.d/sl-modem-daemon status
sudo grep model /etc/modprobe.d/*
sudo dmidecode|egrep 'anufact|roduct|erial|elease'
lsmod | egrep 'snd|usb|midi|udio'
aplay -l
sudo alsa force-reload
sudo lshw -C sound
Then I rebooted the system. But still I am not getting any sound through the speakers. Have I omitted some commands or anything else?
