To test the dist-upgrade with dpkg from proposed being installed during
it, I added `questing-proposed` to the ubuntu.sources and added the
following preferences:
Package: *
Pin: release *-proposed
Pin-Priority: -1
Package: dpkg
Pin: release questing-proposed
Pin-Priority: 999
This causes apt/upgrader to prefer dpkg from questing-proposed. The
pinning annoyed the release upgrader quirks a bit:
2025-10-23 08:30:24,184 DEBUG no PkgRecord found for 'frama-c-base',
skipping
(and so on for packages only in proposed)
but these are harmless.
Now importantly, because the release upgrader checks if all updates are
installed I did not run apt update first.
Now when running do-release-upgrade -d, we can see that the dpkg was
correctly installed:
root@unbiased-cub:~# grep 'dpkg (' /var/log/dist-upgrade/apt-term.log
Unpacking dpkg (1.22.21ubuntu3.1) over (1.22.18ubuntu2.2) ...
Setting up dpkg (1.22.21ubuntu3.1) ...
The upgrade completed successfully:
root@unbiased-cub:~# tail /var/log/dist-upgrade/main.log
2025-10-23 08:34:46,855 DEBUG skipping running kernel pkg
'linux-image-6.14.0-34-generic'
2025-10-23 08:34:46,855 DEBUG skipping running kernel pkg
'linux-headers-6.14.0-34-generic'
2025-10-23 08:34:47,520 DEBUG obsolete package 'linux-tools-6.14.0-34' could
not be removed
2025-10-23 08:34:47,520 DEBUG obsolete package 'linux-headers-6.14.0-34' could
not be removed
2025-10-23 08:34:47,540 DEBUG Finish checking for obsolete pkgs
2025-10-23 08:34:47,588 DEBUG The following packages are marked for removal:
pastebinit byobu libreiserfscore0t64 libsigsegv2 linux-image-6.14.0-33-generic
libllvm18 libllvm19 libxml2 linux-tools-6.14.0-33-generic libclang1-19
libfuse3-3 run-one libclang-cpp18 linux-headers-6.14.0-33-generic
linux-tools-6.14.0-33 linux-modules-6.14.0-33-generic python3-newt libsframe1
linux-headers-6.14.0-33
2025-10-23 08:34:49,592 DEBUG running Quirks.PostCleanup
2025-10-23 08:34:50,000 DEBUG Running PostInstallScript:
'./xorg_fix_proprietary.py'
2025-10-23 08:34:50,034 DEBUG Running PostInstallScript:
'/usr/lib/ubuntu-advantage/convert_list_to_deb822.py'
2025-10-23 08:34:50,147 DEBUG Running PostInstallScript:
'/usr/lib/ubuntu-advantage/upgrade_lts_contract.py'
and no variant field is observed in the status file:
root@unbiased-cub:~# grep Variant /var/lib/dpkg/status
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https://bugs.launchpad.net/bugs/2128606
Title:
Correctly copy Architecture-Variant field
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