Can you see if this issue also occurs with the latest daily image:
http://cdimage.ubuntu.com/daily-live/current/
** Changed in: linux (Ubuntu)
Importance: Undecided = Medium
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On another attempt, I got his message:
Load debconf preconfiguration file
Failed to retrieve the preconfiguration file
The file needed for preconfiguration could not be retrieved from
file:///cdrom/preseed/ubuntu-server-auto.seed. The installation will proceed in
non-automated mode.
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You
