The behaviour is correct. -t changes the default release, pinning the
argument to 990. This must not cause downgrades.
** Changed in: apt (Ubuntu)
Status: New => Invalid
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https://bugs.launchpad.net/bugs/1857018
Title:
apt-get: Can not downgrade dependencies or anything with -t
Status in apt package in Ubuntu:
Invalid
Bug description:
Only the latter command downgrades the mythtv-frontend package (after
removing the PPA from /etc/apt/sources.list.d/ and running 'apt
update'):
$ sudo apt-get install mythtv-frontend -s -V -t bionic
Reading package lists... Done
Building dependency tree
Reading state information... Done
mythtv-frontend is already the newest version
(2:30.0+fixes.201912012038.a27754a~ubuntu18.04.1).
0 upgraded, 0 newly installed, 0 to remove and 8 not upgraded.
$ sudo apt-get install mythtv-frontend/bionic -s -V
Reading package lists... Done
Building dependency tree
Reading state information... Done
Selected version '2:29.1+fixes.20180414.329c235-0ubuntu3'
(Ubuntu:18.04/bionic [amd64]) for 'mythtv-frontend'
Suggested packages:
mythtv-backend (2:29.1+fixes.20180414.329c235-0ubuntu3)
mythmusic (2:29.1+fixes.20180414.329c235-0ubuntu3)
mythweather (2:29.1+fixes.20180414.329c235-0ubuntu3)
mythgallery (2:29.1+fixes.20180414.329c235-0ubuntu3)
mythgame (2:29.1+fixes.20180414.329c235-0ubuntu3)
The following packages will be REMOVED:
mythtv-dbg (2:30.0+fixes.201912012038.a27754a~ubuntu18.04.1)
The following packages will be DOWNGRADED:
mythtv-frontend (2:30.0+fixes.201912012038.a27754a~ubuntu18.04.1 =>
2:29.1+fixes.20180414.329c235-0ubuntu3)
0 upgraded, 0 newly installed, 1 downgraded, 1 to remove and 4 not upgraded.
Remv mythtv-dbg [2:30.0+fixes.201912012038.a27754a~ubuntu18.04.1]
Inst mythtv-frontend [2:30.0+fixes.201912012038.a27754a~ubuntu18.04.1]
(2:29.1+fixes.20180414.329c235-0ubuntu3 Ubuntu:18.04/bionic [amd64])
Conf mythtv-frontend (2:29.1+fixes.20180414.329c235-0ubuntu3
Ubuntu:18.04/bionic [amd64])
I do not know, if there is a reason for the different behavior.
Anyway, I want to be able to easily downgrade the depending packages, too,
retaining their auto/manual status.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: apt 1.6.12
ProcVersionSignature: Ubuntu 5.0.0-37.40~18.04.1-generic 5.0.21
Uname: Linux 5.0.0-37-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.20.9-0ubuntu7.9
Architecture: amd64
CurrentDesktop: XFCE
Date: Thu Dec 19 16:25:51 2019
InstallationDate: Installed on 2019-05-08 (224 days ago)
InstallationMedia: Xubuntu 18.04.2 LTS "Bionic Beaver" - Release amd64
(20190210)
SourcePackage: apt
UpgradeStatus: No upgrade log present (probably fresh install)
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