I have installed linuxmint and it was working fine but suddenly I lost the sound.
I followed the instruction as per the link
http://ubuntuforums.org/showthread.php?t=205449
Mistakenly I issued the following command
sudo apt-get install gdm xubuntu-desktop
The above command replaced my Desktop(Linuxmint) with xubuntu.
How do I restore Linuxmint desktop?
Thanks