Ubuntu Server installer does not mount /cdrom for preseeding

[Michael Yoo]

When trying to use preseeding, the loading of preseeding file fails due to the /cdrom directory not being mounted.

First when I try to install, no error message is shown and installation progresses as normal. However, if I explicitly select the menu option "Load debconf preconfiguration file", I am shown the error message "Failed to retrieve the preconfiguration file: The file needed for preconfiguration could not be retrieved from file:///cdrom/preseed/ubuntu-server.seed. The installation will proceed in non-automated mode."

This bug makes it impossible to use any other preconfiguration seed file, as the same bug happens with other preconfiguration modes/files.

A video of reproduction can be found in the attachments.

If I mount the /cdrom folder manually using "mount -t iso9660 /dev/sr0 /cdrom", I can load the preconfiguration file correctly.

This is on ubuntu-14.04-server-amd64.iso, verified by md5 hash and integrity verified inside installer as shown in the video.

[Mathieu Trudel-Lapierre (cyphermox)]

This is on purpose. In the installer menu, you also show the use of "Detect and mount CD-ROM"; the elements of the installer menu are meant to be run somewhat in the same order as they appear, so on a standard install, the CD-ROM will be mounted before the preseed file is attempted to be read.

I've tested this on ubuntu-14.04.1-server-amd64.iso with no issues.

Closing as "incomplete" for now, so please feel free to set it back to New if you have further details to contribute.

[Launchpad Janitor (janitor)]

[Expired for debian-installer (Ubuntu) because there has been no activity for 60 days.]

[Steve Tyler (instantrice)]

Seeing this error when trying to install from a thumb drive/flash drive/jump drive/usb drive (written that way for SEO).