I am encountering a sound problem in ubuntu 14.04.3. No sound is heard, either from internal speakers, or headphones connected to the PC. I tried to follow http://itsfoss.com/fix-sound-ubuntu-1304-quick-tip/ but after a reboot I can't find Settings or the volume control in the notification zone.
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Is the sound card recognized by the OS? Try to kill and reload alsa by:
killall pulseaudio
sudo alsa force-reload
To resolve the missing icon, just reinstall the desktop with
sudo apt-get install ubuntu-desktop
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