No login prompt and no display manager.

[荒井吉則 <kumagusu08@gmail.com>]

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I did guix system reconfigure config.scm then reboot.
No login prompt and no display manager.

I installed GuixSD again from DVD using same config.scm then reboot. But
same result.

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;; This is an operating system configuration template
;; for a "desktop" setup without full-blown desktop
;; environments.

(use-modules (gnu) (gnu system nss))
(use-service-modules desktop)
(use-package-modules bootloaders certs ratpoison suckless wm)

(operating-system
  (host-name "WaraToNora")
  (timezone "Asia/Tokyo")
  (locale "ja_JP.utf8")

  ;; Use the UEFI variant of GRUB with the EFI System
  ;; Partition mounted on /boot/efi.
  (bootloader (bootloader-configuration
                (bootloader grub-bootloader)
                (target "/dev/sda")
                (menu-entries 
                  (list (menu-entry (label "Wara GNU/Linux lfs-8.3")
                              (linux "(hd0,3)/boot/vmlinuz-4.19.9-libre-wara-8.3")
                              (linux-arguments '("root=/dev/sda3 ro"))
                              (initrd ""))
                        (menu-entry (label "Nora GNU/Linux lfs-8.3") 
                              (linux "(hd0,4)/boot/vmlinuz-4.18.5-lfs-8.3") 
                              (linux-arguments '("root=/dev/sda4 ro"))
                              (initrd ""))))))

  ;; Assume the target root file system is labelled "my-root",
  ;; and the EFI System Partition has UUID 1234-ABCD.
  (file-systems (cons* (file-system
                         (device (file-system-label "my-root"))
                         (mount-point "/")
                         (type "ext4"))
                       (file-system
                         (device "/dev/sda2")
                         (mount-point "swap")
                         (type "swap"))
                       %base-file-systems))

  (users (cons (user-account
                (name "yoshi")
                (comment "Maki's farther")
                (group "users")
                (supplementary-groups '("wheel" "netdev"
                                        "audio" "video"))
                (home-directory "/home/yoshi"))
               %base-user-accounts))

  ;; Add a bunch of window managers; we can choose one at
  ;; the log-in screen with F1.
  (packages (cons* cwm fluxbox                    ;window managers
                   nss-certs                      ;for HTTPS access
                   %base-packages))

  ;; Use the "desktop" services, which include the X11
  ;; log-in service, networking with NetworkManager, and more.
  (services %desktop-services)

  ;; Allow resolution of '.local' host names with mDNS.
  (name-service-switch %mdns-host-lookup-nss))