ubuntu24: change to unity-greeter

Signed-off-by: weishanshan1084 <weishanshan1084@phytium.com.cn>

board/phytium/common/ubuntu-package-installer

@@ -81,8 +81,9 @@ do_distrorfs_second_stage() {
 
     echo installed additional packages.
     if [ $6 = desktop ]; then
-	for pkg in xfce4 ukui-greeter; do
-                DEBIAN_FRONTEND=noninteractive apt -y install $pkg || true
+	for pkg in xfce4 unity-greeter; do
+		DEBIAN_FRONTEND=noninteractive apt -y install $pkg || true
+		rm -rf /usr/share/unity-greeter/logo.png || true
 	done
 	if [[ $2 = jammy || $2 = noble ]]; then
 		sed -i 's/debian-x-terminal-emulator/gnome-terminal/g' /etc/xdg/xfce4/helpers.rc || true
@@ -103,7 +104,7 @@ do_distrorfs_second_stage() {
 	ln -sf /lib/systemd/system/lightdm.service /etc/systemd/system/display-manager.service
 	sed -i "s/gdm3/lightdm/" /etc/X11/default-display-manager
 	echo '[SeatDefaults]'  >> /etc/lightdm/lightdm.conf
-	echo 'greeter-session=ukui-greeter'  >> /etc/lightdm/lightdm.conf
+	echo 'greeter-session=unity-greeter'  >> /etc/lightdm/lightdm.conf
 	echo 'user-session=xfce'  >> /etc/lightdm/lightdm.conf
 
 	echo installing desktop packages: $pkglist