Description of problem:

Package problems while trying to upgrade to F28 

sudo dnf --refresh upgrade (ok)

sudo dnf system-upgrade download --refresh --releasever=28 
Before you continue ensure that your system is fully upgraded by running "dnf --refresh upgrade". Do you want to continue [y/N]: y
Last metadata expiration check: 0:00:00 ago on Tue 17 Apr 2018 09:11:30 AM CEST.
Error: 
 Problem 1: problem with installed package gnome-shell-3.26.2-4.fc27.x86_64
  - gnome-shell-3.26.2-4.fc27.x86_64 does not belong to a distupgrade repository
  - nothing provides libedataserver-1.2.so.23()(64bit) needed by gnome-shell-3.28.0-1.fc28.x86_64
 Problem 2: problem with installed package gnome-contacts-3.26.1-1.fc27.x86_64
  - gnome-contacts-3.26.1-1.fc27.x86_64 does not belong to a distupgrade repository
  - nothing provides libedataserver-1.2.so.23()(64bit) needed by gnome-contacts-3.28.0-1.fc28.x86_64
 Problem 3: problem with installed package gnome-calendar-3.26.4-1.fc27.x86_64
  - gnome-calendar-3.26.4-1.fc27.x86_64 does not belong to a distupgrade repository
  - nothing provides libedataserver-1.2.so.23()(64bit) needed by gnome-calendar-3.28.0-1.fc28.x86_64
 Problem 4: problem with installed package folks-1:0.11.4-3.fc27.x86_64
  - folks-1:0.11.4-3.fc27.x86_64 does not belong to a distupgrade repository
  - nothing provides libedataserver-1.2.so.23()(64bit) needed by folks-1:0.11.4-5.fc28.x86_64
 Problem 5: package evolution-3.26.1-1.fc27.x86_64 requires libgnome-desktop-3.so.12()(64bit), but none of the providers can be installed
  - gnome-desktop3-3.26.2-1.fc27.x86_64 does not belong to a distupgrade repository
  - problem with installed package evolution-3.26.1-1.fc27.x86_64
 Problem 6: package evolution-data-server-3.26.1-1.fc27.x86_64 requires libgweather-3.so.6()(64bit), but none of the providers can be installed
  - libgweather-3.26.2-1.fc27.x86_64 does not belong to a distupgrade repository
  - problem with installed package evolution-data-server-3.26.1-1.fc27.x86_64
 Problem 7: problem with installed package gnome-shell-extension-common-3.26.2-1.fc27.noarch
  - package gnome-shell-extension-common-3.28.0-1.fc28.noarch requires gnome-shell >= 3.28.0, but none of the providers can be installed
  - gnome-shell-extension-common-3.26.2-1.fc27.noarch does not belong to a distupgrade repository
  - nothing provides libedataserver-1.2.so.23()(64bit) needed by gnome-shell-3.28.0-1.fc28.x86_64
 Problem 8: package gnome-shell-extension-user-theme-3.28.0-1.fc28.noarch requires gnome-shell-extension-common = 3.28.0-1.fc28, but none of the providers can be installed
  - problem with installed package gnome-shell-extension-user-theme-3.26.2-1.fc27.noarch
  - package gnome-shell-extension-common-3.28.0-1.fc28.noarch requires gnome-shell >= 3.28.0, but none of the providers can be installed
  - gnome-shell-extension-user-theme-3.26.2-1.fc27.noarch does not belong to a distupgrade repository
  - nothing provides libedataserver-1.2.so.23()(64bit) needed by gnome-shell-3.28.0-1.fc28.x86_64
 Problem 9: package chrome-gnome-shell-10.1-1.fc28.x86_64 requires gnome-shell, but none of the providers can be installed
  - package gnome-shell-3.26.2-4.fc27.x86_64 requires libmutter-1.so.0()(64bit), but none of the providers can be installed
  - problem with installed package chrome-gnome-shell-10.1-1.fc27.x86_64
  - mutter-3.26.2-2.fc27.x86_64 does not belong to a distupgrade repository
  - chrome-gnome-shell-10.1-1.fc27.x86_64 does not belong to a distupgrade repository
  - nothing provides libedataserver-1.2.so.23()(64bit) needed by gnome-shell-3.28.0-1.fc28.x86_64
 Problem 10: cannot install both libgweather-3.28.1-1.fc28.x86_64 and libgweather-3.26.2-1.fc27.x86_64
  - package gnome-clocks-3.28.0-1.fc28.x86_64 requires libgweather-3.so.15()(64bit), but none of the providers can be installed
  - package evolution-data-server-3.26.1-1.fc27.x86_64 requires libgweather-3.so.6()(64bit), but none of the providers can be installed
  - problem with installed package gnome-clocks-3.26.1-1.fc27.x86_64
  - package evolution-data-server-langpacks-3.26.1-1.fc27.noarch requires evolution-data-server = 3.26.1-1.fc27, but none of the providers can be installed
  - gnome-clocks-3.26.1-1.fc27.x86_64 does not belong to a distupgrade repository
  - problem with installed package evolution-data-server-langpacks-3.26.1-1.fc27.noarch
 Problem 11: cannot install both gnome-desktop3-3.28.0-1.fc28.x86_64 and gnome-desktop3-3.26.2-1.fc27.x86_64
  - package cheese-2:3.28.0-1.fc28.x86_64 requires libgnome-desktop-3.so.17()(64bit), but none of the providers can be installed
  - package evolution-3.26.1-1.fc27.x86_64 requires libgnome-desktop-3.so.12()(64bit), but none of the providers can be installed
  - problem with installed package cheese-2:3.26.0-1.fc27.x86_64
  - package evolution-ews-3.26.1-1.fc27.x86_64 requires evolution >= 3.26.1, but none of the providers can be installed
  - cheese-2:3.26.0-1.fc27.x86_64 does not belong to a distupgrade repository
  - problem with installed package evolution-ews-3.26.1-1.fc27.x86_64
 Problem 12: cannot install both gnome-desktop3-3.28.0-1.fc28.x86_64 and gnome-desktop3-3.26.2-1.fc27.x86_64
  - package cheese-libs-2:3.28.0-1.fc28.x86_64 requires libgnome-desktop-3.so.17()(64bit), but none of the providers can be installed
  - package evolution-3.26.1-1.fc27.x86_64 requires libgnome-desktop-3.so.12()(64bit), but none of the providers can be installed
  - problem with installed package cheese-libs-2:3.26.0-1.fc27.x86_64
  - package evolution-help-3.26.1-1.fc27.noarch requires evolution = 3.26.1-1.fc27, but none of the providers can be installed
  - cheese-libs-2:3.26.0-1.fc27.x86_64 does not belong to a distupgrade repository
  - problem with installed package evolution-help-3.26.1-1.fc27.noarch
 Problem 13: cannot install both gnome-desktop3-3.28.0-1.fc28.x86_64 and gnome-desktop3-3.26.2-1.fc27.x86_64
  - package gnome-control-center-3.28.1-1.fc28.x86_64 requires libgnome-desktop-3.so.17()(64bit), but none of the providers can be installed
  - package evolution-3.26.1-1.fc27.x86_64 requires libgnome-desktop-3.so.12()(64bit), but none of the providers can be installed
  - problem with installed package control-center-1:3.26.2-2.fc27.x86_64
  - package evolution-langpacks-3.26.1-1.fc27.noarch requires evolution = 3.26.1-1.fc27, but none of the providers can be installed
  - control-center-1:3.26.2-2.fc27.x86_64 does not belong to a distupgrade repository
  - problem with installed package evolution-langpacks-3.26.1-1.fc27.noarch
 Problem 14: cannot install both gnome-desktop3-3.28.0-1.fc28.x86_64 and gnome-desktop3-3.26.2-1.fc27.x86_64
  - package evolution-3.26.1-1.fc27.x86_64 requires libgnome-desktop-3.so.12()(64bit), but none of the providers can be installed
  - package eog-3.28.0-1.fc28.x86_64 requires libgnome-desktop-3.so.17()(64bit), but none of the providers can be installed
  - package evolution-ews-3.26.1-1.fc27.x86_64 requires evolution >= 3.26.1, but none of the providers can be installed
  - problem with installed package eog-3.26.2-1.fc27.x86_64
  - package evolution-ews-langpacks-3.26.1-1.fc27.noarch requires evolution-ews = 3.26.1-1.fc27, but none of the providers can be installed
  - eog-3.26.2-1.fc27.x86_64 does not belong to a distupgrade repository
  - problem with installed package evolution-ews-langpacks-3.26.1-1.fc27.noarch
 Problem 15: package mutter-3.26.2-2.fc27.x86_64 requires libgnome-desktop-3.so.12()(64bit), but none of the providers can be installed
  - package gnome-shell-3.26.2-4.fc27.x86_64 requires libmutter-1.so.0()(64bit), but none of the providers can be installed
  - cannot install both gnome-desktop3-3.28.0-1.fc28.x86_64 and gnome-desktop3-3.26.2-1.fc27.x86_64
  - package gdm-1:3.28.0-6.fc28.x86_64 requires gnome-shell, but none of the providers can be installed
  - package evince-3.28.0-1.fc28.x86_64 requires libgnome-desktop-3.so.17()(64bit), but none of the providers can be installed
  - problem with installed package gdm-1:3.26.2.1-3.fc27.x86_64
  - problem with installed package evince-3.26.0-1.fc27.x86_64
  - gdm-1:3.26.2.1-3.fc27.x86_64 does not belong to a distupgrade repository
  - evince-3.26.0-1.fc27.x86_64 does not belong to a distupgrade repository
  - nothing provides libedataserver-1.2.so.23()(64bit) needed by gnome-shell-3.28.0-1.fc28.x86_64
 Problem 16: package mutter-3.26.2-2.fc27.x86_64 requires libgnome-desktop-3.so.12()(64bit), but none of the providers can be installed
  - package gnome-shell-3.26.2-4.fc27.x86_64 requires libmutter-1.so.0()(64bit), but none of the providers can be installed
  - cannot install both gnome-desktop3-3.28.0-1.fc28.x86_64 and gnome-desktop3-3.26.2-1.fc27.x86_64
  - package gnome-shell-extension-background-logo-3.24.0-5.fc28.noarch requires gnome-shell >= 3.24.0, but none of the providers can be installed
  - package gnome-documents-libs-3.28.0-1.fc28.x86_64 requires libgnome-desktop-3.so.17()(64bit), but none of the providers can be installed
  - problem with installed package gnome-shell-extension-background-logo-3.24.0-2.fc27.noarch
  - problem with installed package gnome-documents-libs-3.26.2-1.fc27.x86_64
  - gnome-shell-extension-background-logo-3.24.0-2.fc27.noarch does not belong to a distupgrade repository
  - gnome-documents-libs-3.26.2-1.fc27.x86_64 does not belong to a distupgrade repository
  - nothing provides libedataserver-1.2.so.23()(64bit) needed by gnome-shell-3.28.0-1.fc28.x86_64
 Problem 17: package mutter-3.26.2-2.fc27.x86_64 requires libgnome-desktop-3.so.12()(64bit), but none of the providers can be installed
  - package gnome-shell-3.26.2-4.fc27.x86_64 requires libmutter-1.so.0()(64bit), but none of the providers can be installed
  - cannot install both gnome-desktop3-3.28.0-1.fc28.x86_64 and gnome-desktop3-3.26.2-1.fc27.x86_64
  - package gnome-tweaks-3.28.0-1.fc28.noarch requires gnome-shell >= 3.24, but none of the providers can be installed
  - package gnome-font-viewer-3.28.0-1.fc28.x86_64 requires libgnome-desktop-3.so.17()(64bit), but none of the providers can be installed
  - problem with installed package gnome-tweak-tool-3.26.4-1.fc27.noarch
  - problem with installed package gnome-font-viewer-3.26.0-1.fc27.x86_64
  - gnome-tweak-tool-3.26.4-1.fc27.noarch does not belong to a distupgrade repository
  - gnome-font-viewer-3.26.0-1.fc27.x86_64 does not belong to a distupgrade repository
  - nothing provides libedataserver-1.2.so.23()(64bit) needed by gnome-shell-3.28.0-1.fc28.x86_64
 Problem 18: package mutter-3.26.2-2.fc27.x86_64 requires libgnome-desktop-3.so.12()(64bit), but none of the providers can be installed
  - package gnome-shell-3.26.2-4.fc27.x86_64 requires libmutter-1.so.0()(64bit), but none of the providers can be installed
  - cannot install both gnome-desktop3-3.28.0-1.fc28.x86_64 and gnome-desktop3-3.26.2-1.fc27.x86_64
  - package gdm-1:3.28.0-6.fc28.x86_64 requires gnome-shell, but none of the providers can be installed
  - package gnome-initial-setup-3.28.0-5.fc28.x86_64 requires libgnome-desktop-3.so.17()(64bit), but none of the providers can be installed
  - problem with installed package pulseaudio-gdm-hooks-11.1-15.fc27.x86_64
  - problem with installed package gnome-initial-setup-3.26.0-1.fc27.x86_64
  - pulseaudio-gdm-hooks-11.1-15.fc27.x86_64 does not belong to a distupgrade repository
  - gnome-initial-setup-3.26.0-1.fc27.x86_64 does not belong to a distupgrade repository
  - nothing provides libedataserver-1.2.so.23()(64bit) needed by gnome-shell-3.28.0-1.fc28.x86_64
 Problem 19: package evolution-data-server-3.26.1-1.fc27.x86_64 requires libgweather-3.so.6()(64bit), but none of the providers can be installed
  - cannot install both libgweather-3.28.1-1.fc28.x86_64 and libgweather-3.26.2-1.fc27.x86_64
  - package folks-1:0.11.4-3.fc27.x86_64 requires libebackend-1.2.so.10()(64bit), but none of the providers can be installed
  - package gnome-settings-daemon-3.28.0-2.fc28.x86_64 requires libgweather-3.so.15()(64bit), but none of the providers can be installed
  - package gnome-maps-3.28.0-1.fc28.x86_64 requires libfolks.so.25()(64bit), but none of the providers can be installed
  - problem with installed package gnome-settings-daemon-3.26.2-2.fc27.x86_64
  - problem with installed package gnome-maps-3.26.2-1.fc27.x86_64
  - gnome-settings-daemon-3.26.2-2.fc27.x86_64 does not belong to a distupgrade repository
  - gnome-maps-3.26.2-1.fc27.x86_64 does not belong to a distupgrade repository
  - nothing provides libedataserver-1.2.so.23()(64bit) needed by folks-1:0.11.4-5.fc28.x86_64
(try to add '--allowerasing' to command line to replace conflicting packages or '--skip-broken' to skip uninstallable packages)

Version-Release number of selected component (if applicable):
f27 
python3-dnf-plugin-system-upgrade-2.0.5-1.fc27.noarch

How reproducible:
dnf system-upgrade download --refresh --releasever=28

I don't see any 3rd party packages problems/ All problems above are about gnome and gnome related packages


Steps to Reproduce:
1. dnf system-upgrade download --refresh --releasever=28
2. look for errors

Actual results:
Upgrade not possible without removing gnome/gdm packages

....
Removing dependent packages:
 chrome-gnome-shell                              x86_64      10.1-1.fc27                                    @updates                   61 k
 evolution                                       x86_64      3.26.1-1.fc27                                  @fedora                    15 M
 evolution-data-server                           x86_64      3.26.1-1.fc27                                  @fedora                   6.9 M
 evolution-data-server-langpacks                 noarch      3.26.1-1.fc27                                  @fedora                   8.2 M
 evolution-ews                                   x86_64      3.26.1-1.fc27                                  @fedora                   1.1 M
 evolution-ews-langpacks                         noarch      3.26.1-1.fc27                                  @fedora                   844 k
 evolution-help                                  noarch      3.26.1-1.fc27                                  @fedora                    13 M
 evolution-langpacks                             noarch      3.26.1-1.fc27                                  @fedora                    35 M
 folks                                           x86_64      1:0.11.4-3.fc27                                @fedora                   2.6 M
 gdm                                             x86_64      1:3.26.2.1-3.fc27                              @updates                  2.2 M
 gnome-calendar                                  x86_64      3.26.4-1.fc27                                  @updates                  2.4 M
 gnome-contacts                                  x86_64      3.26.1-1.fc27                                  @updates                  1.6 M
 gnome-initial-setup                             x86_64      3.26.0-1.fc27                                  @fedora                   2.5 M
 gnome-maps                                      x86_64      3.26.2-1.fc27                                  @updates                  2.6 M
 gnome-shell                                     x86_64      3.26.2-4.fc27                                  @updates                   11 M
 gnome-shell-extension-background-logo           noarch      3.24.0-2.fc27                                  @fedora                    58 k
 gnome-shell-extension-common                    noarch      3.26.2-1.fc27                                  @updates                  590 k
 gnome-shell-extension-user-theme                noarch      3.26.2-1.fc27                                  @updates                  7.0 k
 gnome-tweak-tool                                noarch      3.26.4-1.fc27                                  @updates                  1.3 M
 pulseaudio-gdm-hooks                            x86_64      11.1-15.fc27                                   @updates                  35


Expected results:
Upgrade to F28 possible without removing 'core' packages ^

BTW: Upgrade works, but you need to install above packages from console - no gdm after reboot to F28 and enable graphical target/gdm service. Really annoying for non-technical users. 

Additional info:
n/a