Configuring System Hostname with preseed and dhcp

[Sebastian Himmler]

Hi,

I'm currently trying to do an automated, preseeded installation of Ubuntu 
Gnome 14.04.
Everything is working well, apart from the network config. I want to configure 
the client to set the hostname from dhcp or dns during installation. The 
dhcp-server is sending the host-name option. This config is working with 
normal ubuntu net installers.

When the installation is finished, the hostname still remains "ubuntu".

My net-cfg config:
d-i netcfg/enable boolean true
d-i netcfg/dhcp_timeout string 60
d-i netcfg/choose_interface select eth0


What else is there to be configured in Ubuntu Gnome?

Thanks for your advise

Sebastian