New install of Alpine 3.21 with XFCE does not boot to a working GUI.

A fresh instance of 3.21 with the XFCE desktop environment will not start correctly or accept input.

Boot system from the alpine-standard-3.21.0-x86_64.iso file. Execute setup-alpine

• us us keyboard selection
• Create a user.
• All other settings are default Reboot Execute 'setup-desktop xfce' Reboot

LightDM fails to load.

• The screen flashes a few times and settles on a blank screen with a flashing cursor.
• The /var/log/lightdm/seat0-greeter.log file contains only one line: Failed to open PAM session: Permission denied

Switching to the terminal and running startx will launch the DE, but no input is accepted.

Edit the /etc/pam.d/lightdm-greeter file: Comment the -session optional pam-elogind.so Reboot. LightDM appears to work and the DE loads as expected, but the Restart and Shutdown action menu items are grayed out.

Execute apk add elogind polkit-elogind resolves the action menu items.