Please note that you can using synaptic only with teh user account created at the time of installation. Others users don't have access to synaptic. Please tell us if you are trying accessing synaptic in such fashion.
-- synaptic doesn't launch with sudo privilege https://launchpad.net/bugs/90980 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs