The message can not be shown only if the package is going to ask questions as debconf would need to extract the questions beforehand (and find none) for that to work – but it can't do that without apt-utils. :)
Not sure about the stderr vs. stdout, I guess the rational is that its more important than the "normal" output. In any case, this is something you will have to bring up with debconf… reassigning there (and resetting status). ** Package changed: apt (Ubuntu) => debconf (Ubuntu) ** Changed in: debconf (Ubuntu) Status: Opinion => New -- You received this bug notification because you are a member of Ubuntu Touch seeded packages, which is subscribed to debconf in Ubuntu. https://bugs.launchpad.net/bugs/1919314 Title: debconf: delaying package configuration, since apt-utils is not installed Status in debconf package in Ubuntu: New Bug description: The warning appears when installing apt-utils, with no way to silence the message. If apt-utils is required in the base image, it should be added there and not be a standalone package. This is a transcript from Ubuntu 20.04.1: $ LANG=C sudo apt install apt-utils Reading package lists... Done Building dependency tree Reading state information... Done The following NEW packages will be installed: apt-utils 0 upgraded, 1 newly installed, 0 to remove and 159 not upgraded. Need to get 0 B/213 kB of archives. After this operation, 852 kB of additional disk space will be used. debconf: delaying package configuration, since apt-utils is not installed Selecting previously unselected package apt-utils. (Reading database ... 688084 files and directories currently installed.) Preparing to unpack .../apt-utils_2.0.4_amd64.deb ... Unpacking apt-utils (2.0.4) ... Setting up apt-utils (2.0.4) ... Processing triggers for man-db (2.9.1-1) ... ProblemType: Bug DistroRelease: Ubuntu 20.04 Package: apt-utils 2.0.4 ProcVersionSignature: Ubuntu 5.4.0-65.73-generic 5.4.78 Uname: Linux 5.4.0-65-generic x86_64 NonfreeKernelModules: zfs zunicode zavl icp zcommon znvpair nvidia_modeset nvidia ApportVersion: 2.20.11-0ubuntu27.16 Architecture: amd64 CasperMD5CheckResult: skip CurrentDesktop: KDE Date: Tue Mar 16 11:30:26 2021 EcryptfsInUse: Yes SourcePackage: apt UpgradeStatus: Upgraded to focal on 2020-05-04 (315 days ago) To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/debconf/+bug/1919314/+subscriptions -- Mailing list: https://launchpad.net/~touch-packages Post to : touch-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~touch-packages More help : https://help.launchpad.net/ListHelp