I can also confirm that it isn't just KDE that is having this problem. I just ran into it today using network-anager under GNOME. How it happened for me was to switch from 'roaming' to use DHCP... I too am getting the "sudo: unable to resolve host geoff-laptop" error when trying to sudo.
I can also confirm that it isn't just KDE that is having this problem. I just ran into it today using network-anager under GNOME. How it happened for me was to switch from 'roaming' to use DHCP... I too am getting the "sudo: unable to resolve host geoff-laptop" error when trying to sudo.
I am using the LTS Hardy release.