vivid ubiquity dns resolution

[ubuntushop]

vivid preseed install with ubiquity has no dns resolution, so mirror is not refreshed and wget is not working in success_command. Ubuntu 14.10 is working ok.

[ubuntushop (g-info-l)]

As soon as the ubiquity installer starts, I can go to the network-manager applet and edit the connection (dhcp). There is no gateway and dns ip address. If I fill in these ip's, the installer does his job completely.
My preseed file has this config:
# Network Configuration
d-i netcfg/enable boolean true
d-i netcfg/choose_interface select auto
d-i netcfg/disable_dhcp boolean false
# Configure the sources.list
d-i mirror/protocol string http
d-i mirror/country string BE
d-i mirror/http/hostname string be.archive.ubuntu.com
d-i mirror/http/directory string /ubuntu/
d-i apt-setup/use_mirror boolean true
d-i apt-setup/mirror/error select Change mirror
d-i apt-setup/multiverse boolean true
d-i apt-setup/restricted boolean true
d-i apt-setup/universe boolean true
d-i apt-setup/partner boolean true
 d-i netcfg/get_hostname string ubuntu

preseed file is loaded coreect from my server, but the url is an IP, no domain.

[ubuntushop (g-info-l)]

Some additional information:
Starting a preseed install with ubuntu 14.10 with ubiquity, the networkmanager shows a auto dhcp connection that is ok.

In a preseed ubiquity install ubuntu 15.04, the networkmanager shows a manual connection with a correct Ip address(same as the 14.10 installer), and a good netmask of 255.255.255.0, but no gateway and dns servers ip's.

[ubuntushop (g-info-l)]

No workaround yet?

[ubuntushop (g-info-l)]

workaround:
d-i preseed/early_command string echo -e "iface eth0 inet dhcp\nallow-hotplug eth0" >> /root/etc/network/interfaces && ifup eth0

I have to remove that in preseed late command in order to get network-manager working again after installation

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.