Hi All!
I am using Ubuntu 12.04 with LXDE. This is office's allocated laptop.
I have a problem here now, my /etc/resolv.conf file is not getting updated automatically whenever I am switching network, i.e. home or office. I have to do it manually every-time, I manually input the office's DNS, when I come to office, or Google's DNS whenever I log-on to home's network.
I have reset the resolvconf, but it didn't help.
Anybody here has any clue about it?
Sad no help 
Are you using DHCP or a static IP configuration?
Sorry for late reply!
I am using DHCP at both places.