I’m having this issue coming from KDE as well.
libgdm-dev
is not installed, neither is gdm-dev
Since noone seems to have posted them, here’s the full output of sudo pacman -S gnome
[max@xps-nix ~]$ sudo pacman -S gnome
:: There are 71 members in group gnome:
:: Repository extra
1) baobab 2) cheese 3) eog 4) epiphany 5) evince 6) file-roller 7) gdm 8) gdm-dev 9) gedit 10) gnome-backgrounds
11) gnome-books 12) gnome-calculator 13) gnome-calendar 14) gnome-characters 15) gnome-clocks 16) gnome-color-manager
17) gnome-contacts 18) gnome-control-center 19) gnome-disk-utility 20) gnome-documents 21) gnome-font-viewer
22) gnome-getting-started-docs 23) gnome-keyring 24) gnome-logs 25) gnome-maps 26) gnome-menus 27) gnome-music
28) gnome-photos 29) gnome-remote-desktop 30) gnome-screenshot 31) gnome-session 32) gnome-settings-daemon
33) gnome-shell 34) gnome-shell-extensions 35) gnome-software 36) gnome-system-monitor 37) gnome-terminal
38) gnome-themes-extra 39) gnome-user-docs 40) gnome-user-share 41) gnome-video-effects 42) gnome-weather
43) grilo-plugins 44) gvfs 45) gvfs-afc 46) gvfs-goa 47) gvfs-google 48) gvfs-gphoto2 49) gvfs-mtp 50) gvfs-nfs
51) gvfs-smb 52) mutter 53) mutter-x11-sc 54) nautilus 55) networkmanager 56) orca 57) rygel 58) sushi 59) totem
60) tracker 61) tracker-miners 62) tracker3 63) tracker3-miners 64) vino 65) xdg-user-dirs-gtk 66) yelp
:: Repository community
67) gdm-plymouth 68) gnome-boxes 69) gnome-control-center-pop-shell-shortcuts 70) nautilus-typeahead 71) simple-scan
Enter a selection (default=all):
warning: gnome-disk-utility-3.38.0-1 is up to date -- reinstalling
warning: gnome-keyring-1:3.36.0-1 is up to date -- reinstalling
warning: gnome-session-3.38.0-1 is up to date -- reinstalling
warning: gnome-settings-daemon-3.38.1-1 is up to date -- reinstalling
warning: gnome-themes-extra-3.28-2 is up to date -- reinstalling
warning: gvfs-1.46.1-1 is up to date -- reinstalling
warning: gvfs-afc-1.46.1-1 is up to date -- reinstalling
warning: gvfs-gphoto2-1.46.1-1 is up to date -- reinstalling
warning: gvfs-mtp-1.46.1-1 is up to date -- reinstalling
warning: gvfs-nfs-1.46.1-1 is up to date -- reinstalling
warning: gvfs-smb-1.46.1-1 is up to date -- reinstalling
warning: mutter-3.38.1-1 is up to date -- reinstalling
warning: networkmanager-1.26.4-1 is up to date -- reinstalling
warning: tracker3-3.0.1-1 is up to date -- reinstalling
resolving dependencies...
looking for conflicting packages...
warning: removing 'gdm' from target list because it conflicts with 'gdm-dev'
error: unresolvable package conflicts detected
error: failed to prepare transaction (conflicting dependencies)
:: gdm-dev and libgdm-dev are in conflict
I think the issue may be that both gdm and gdm-dev are included under the gnome group, so both try to install?
e: following this theory, attempted to install the range 1-7, 9-71
for the above and it went off without a hitch. So i guess that’s probably the culprit. If the group could be updated to remove the conflict, that’d probably help those of us who just try to take the default action, assuming it’s sane and tested