[Bug 1746807] Re: 18.04 daily installer fails missing kernel

[Steve Langasek]

>From the logs:

 base-installer: This disc is called: 
 base-installer: 'Lubuntu 18.04 LTS _Bionic Beaver_ - Alpha amd64 (20180213)'
 base-installer: Copying package lists...
 base-installer: gpgv: Signature made Tue Feb 13 16:36:04 2018 UTC
 base-installer: 
 base-installer: gpgv:                using RSA key 
 base-installer: 
 base-installer: gpgv: Good signature from "Ubuntu CD Image Automatic Signing Ke
y (2012) <cdimage at ubuntu.com>"
 base-installer: 
 base-installer: E
 base-installer: : 
 base-installer: Stat failed for /media/cdrom/dists/bionic/main/dist-upgrader/binary-all/Packages - stat (2: No such file or directory)
 base-installer: 
 base-installer: E
 base-installer: : 
 base-installer: No CD-ROM could be auto-detected or found using the default mount point.
 base-installer: 
 base-installer:    
 base-installer: You may try the --cdrom option to set the CD-ROM mount point.

What is strange is that I *do* see a dists/bionic/main/dist-upgrader
/binary-all/Packages file in the current daily amd64 image (20180215).
I don't know why this file exists, given that this directory is not an
apt source.  I do not know why base-installer is trying to parse it,
given that it's not referenced in the Releases file for the CD.  I do
not know why the stat is reported to fail given that the file clearly
exists (and is empty).

Answering any one of these questions is likely to yield a solution for
this bug.

** Package changed: debian-installer (Ubuntu) => base-installer (Ubuntu)

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https://bugs.launchpad.net/bugs/1746807

Title:
  18.04 daily installer fails missing kernel

Status in base-installer package in Ubuntu:
  Confirmed

Bug description:
  "No installable kernel was found in the defined APT sources.

  You may try to continue without a kernel, and manually install your own kernel later.
  This is only recommended for experts, otherwise you will likely end up with a machine
  that doesn't boot.

  Continue without installing a kernel."

  Lubuntu Daily 18.04 dated 2018-February 1.

  note: yesterdays (Jan 31) install works fine.

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