Bug#919982: apt-setup: preseeded installation hangs at "Use a network mirror?"

[Lucas Nussbaum <lucas@debian.org>]

On 21/01/19 at 10:55 +0100, Lucas Nussbaum wrote:
> Package: apt-setup
> Severity: normal
> 
> Hi,
> 
> We use d-i weekly images[1] to create Debian testing system images. Our
> installation process is fully automated with preseeding.
> 
> The installation process hangs on the apt-setup/use_mirror question (see
> screenshot). It did not with d-i alpha 4.
> 
> See attached log and preseeding file.
> 
> - Lucas

Hi,

After further investigations, it seems that the bug is related to:

> Jan 21 08:02:09 kernel: [    0.000000] Command line: BOOT_IMAGE=/install.amd/vmlinuz vga=788 initrd=/install.amd/initrd.gz --- quiet  preseed/url=http://10.0.2.2:8000/preseed.cfg auto locale=en_US kbd-chooser/method=us netcfg/get_hostname=localhost netcfg/get_domain=localdomain fb=false debconf/frontend=noninteractive console-setup/ask_detect=false console-keymaps-at/keymap=us keyboard-configuration/xkb-keymap=us 

Which is a bit stupid: instead of passing many parameters on the
cmdline, we could just use 'auto url=....'

Still, there's a regression in d-i, when installing with
install preseed/url=https://blop.info/pub/preseed.cfg

With debian-buster-DI-alpha4-amd64-netinst.iso, the installer asks
questions about language, location, keyboard, hostname, and domainname,
but then proceeds until the end of the installation (which is expected).

With the current debian-testing-amd64-netinst.iso, the installer asks
the same questions, proceeds with the installation, but then, near the
end, asks the 'Use a network mirror?' question as described in this bug.

Lucas