Sound stopped functioning after upgrading to 7.10. at first but when I restarted the system after some adjustments requested a restart, the sound was no longr functioning after the restart.

I had a similar problem with mine with a fresh install of 7.10

Mine is a laptop so it may be a different problem but mine was cured by installing

alsa 1.015 ( Gutsy comes with alsa 1.014 )

Thank you for your reply. I'm very new to Linux and I don't know how to do that.

Can you tell me how to go about installing alsa 1.015?

Can anyone tell me how to go about installing alsa 1.015?

this is a long standing problem of mine and im trying to fix it (my sound works sometimes, not always - plus i have a really old sound blaster live soundcard which prolly doesnt help)

1. apparently when u install things (ie tinkering), it can screw up ur sound card configuration.
read this especially the fresh kernel section.
https://help.ubuntu.com/community/SoundTroubleshooting
NOTE THAT WEN U UNINSTALL THOSE SOUND PACKAGES, IT UNINSTALLS YOUR GDM! not sure why but u need to make sure u include it in the reinstall packages otherwise wen u restart ull restart in terminal mode.

also note that the site above is for ubuntu fiesty and and not ubuntu gutsy, so even more packages are accidentally removed (gdm, ubuntu-desktop etc). basically run sudo apt-get --purge remove linux-sound-base alsa-base alsa-utils and whatever comes up as uninstalled make sure u include it in the install list (sudo apt-get install ...)

2. ive also read that installing esound in ubuntu gutsy fixes this problem. havent tried it:
http://ubuntuforums.org/showthread.php?t=588708

search around the net and the ubuntu forums cause there is heaps of discussion on this topic.

Oh! that info is really helpful for me because I am also new in Linux or in Ubuntu.
I am Peter and working on https://bit.ly/2tKOGRp