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Launchpad entry: https://launchpad.net/products/upstart/+spec/SerialIntegration
This specification proposes using debconf to enable Serial Port support.
During the installation of Ubuntu Server, there is no means available to preseed, or enable otherwise, serial interface support. Currently, the only course of action is to use the debconf option "preseed/late-command" that runs a script. The script then installs a job that enables serial support.
The primary use case for this implementation is for headless server installations.
The scope of this proposal is limited to the ubuntu packaging branch.