Fix for gnome desktops to use lightdm and slick-greeter (#3947)

* change layout

* fixing gnome to use lightdm  lightdm-settings and slick-greeter

Co-authored-by: Igor Pečovnik <igorpecovnik@users.noreply.github.com>

config/desktop/bullseye/environments/gnome/config_base/packages

@@ -158,6 +158,7 @@ libxtst6
 libxxf86dga1
 libyelp0
 lightdm
+lightdm-settings
 mutter
 mutter-common
 nautilus

config/desktop/focal/environments/gnome/config_base/packages

@@ -173,8 +173,7 @@ libxtst6
 libxxf86dga1
 libyelp0
 lightdm
-lightdm-gtk-greeter
-lightdm-gtk-greeter-settings
+lightdm-dettings
 linux-sound-base
 mutter
 mutter-common

config/desktop/jammy/environments/gnome/config_base/packages

@@ -96,6 +96,7 @@ libxtst6
 libxxf86dga1
 libyelp0
 lightdm
+lightdm-settings
 linux-sound-base
 mutter
 mutter-common

config/desktop/sid/environments/gnome/config_base/packages

@@ -14,7 +14,6 @@ fonts-urw-base35
 foomatic-db-compressed-ppds
 gcr
 gdebi
-gdm3
 genisoimage
 ghostscript
 ghostscript-x
@@ -84,6 +83,8 @@ libxmuu1
 libxtst6
 libxxf86dga1
 libyelp0
+lightdm
+lightdm-settings
 mutter
 mutter-common
 nautilus
@@ -106,6 +107,7 @@ python3-debian
 python3-distutils
 python3-distutils-extra
 python3-yaml
+slick-greeter
 qalculate-gtk
 software-properties-gtk
 spice-vdagent

config/desktop/sid/environments/gnome/config_base/packages.uninstall

@@ -0,0 +1 @@
+gdm3

config/desktop/sid/environments/gnome/debian/postinst

@@ -1,6 +1,6 @@
 # overwrite stock lightdm greeter configuration
 if [ -d /etc/armbian/lightdm ]; then cp -R /etc/armbian/lightdm /etc/; fi
-#if [ -f /etc/lightdm/slick-greeter.conf ]; then sed -i 's/armbian03-Dre0x-Minum-dark-blurred-3840x2160.jpg/armbian-4k-black-psycho-gauss.jpg/g' /etc/lightdm/slick-greeter.conf; fi
+
 
 # Disable Pulseaudio timer scheduling which does not work with sndhdmi driver
 if [ -f /etc/pulse/default.pa ]; then sed "s/load-module module-udev-detect$/& tsched=0/g" -i  /etc/pulse/default.pa; fi