There is no correct behavior here.
xubuntu-desktop depends on lightdm, lightdm-gtk-greeter; so apt will
install lightdm which Recommends unity-greeter | lightdm-greeter |
lightdm-kde-greeter. Hence apt installs unity-greeter. Then it installs
lightdm-gtk-greeter.
Telling apt to install xubuntu-desktop and lightdm-gtk-greeter means you
made the choice to use that, and thus don't need unity-greeter.
Just not installing unity-greeter is (a) not possible in a greedy
algorithm and (b) leads to wrong results in other cases (like installing
an sqlite backend for something instead of an mysql one because it has
fewer packages). The EDSP solvers and the kalel solver can do that.
That said, for the future solver generation, my goal is to behave
similar to now, but more strict. If something depends on A|B, the
solver will inject a Recommends: A, unless B is already installed or
manually marked for install. This will cause even more packages to be
installed than now in some situations, but it's the best compromise we
can offer.
** Changed in: apt (Ubuntu)
Status: New => Invalid
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Ubuntu.
https://bugs.launchpad.net/bugs/1754872
Title:
apt install xubuntu-desktop does not resolve dependencies properly
Status in apt package in Ubuntu:
Invalid
Status in gnome-control-center package in Ubuntu:
Invalid
Status in indicator-datetime package in Ubuntu:
Invalid
Status in xubuntu-meta package in Ubuntu:
Confirmed
Bug description:
Steps to reproduce:
1. Install `xubuntu-desktop` meta package on 18.04 LTS
2. Login to session
3a. Click on clock indicator on panel, select "Time & Date Settings"
3b. Click on Gear, select "About this Computer" or "System Settings"
3c. Click on keyboard layout indicator, select "Text Entry Settings"
Expected results:
xfce-oriented control center is opened
Actual results:
gnome-control-center is opened, but with empty window.
ProblemType: Bug
DistroRelease: Ubuntu 18.04
Package: xubuntu-desktop 2.223
ProcVersionSignature: Ubuntu 4.15.0-10.11-generic 4.15.3
Uname: Linux 4.15.0-10-generic x86_64
ApportVersion: 2.20.8-0ubuntu10
Architecture: amd64
CurrentDesktop: XFCE
Date: Sat Mar 10 21:10:11 2018
SourcePackage: xubuntu-meta
UpgradeStatus: No upgrade log present (probably fresh install)
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