I Installed Ubuntu in laptop and audio was fine but I changed replaced Unity with Lubuntu and now audio is not working. Can anybody help?
This may not help but I just installed lubuntu and tried to get my usb headphones to work but they did not...I installed adio mixer and pulse audio but neither worked. I then thought wth why not do a reboot..IT Worked!! I now have sound through my usb head phones...although my sound did work on my laptop speakers before....just and FYI.
Invoke (menu) -> Sound&Video-> PulseAudio Volume Control if you have it installed already. Go to the [Output Devices] tab, that's the third one up at the top. Find your output device in the list. Make sure the Green globe-with-the-white-check button to the far right is indented, (shadowy), not unclicked out. This connects your sound to your appropriate output device. Make sure the blue master-volume slider is roughly in the middle, and not completely slid to the left. You should hear a little "pock" when you reposition it, that tells you your headphones are turned on.
Sometimes this gets reset by itself on reboot. You can check the panel to make sure your sound output is being sent to the proper device when you start your computer.