bug#30467: GuixSD fails to display login prompt on headless server

[George myglc2 Clemmer <myglc2@gmail.com>]

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Hi Danny,

I think we got side-tracked to the serial port when my real issue is
with the VGA port. Maybe my bug report was not clear. Let me clarify ...

My headless server stopped displaying the console tty login *on the VGA
port* somewhere between (GNU Guix) 0.13.0.4589-74bea6 (my G18) and (GNU
Guix) 0.13.0.5042-6e385 (My G19). In the later version, when I reboot
the VGA displays 1) the BIOS prompt, 2) the grub boot menu, 3) "Booting
GNU with Linuxlibre ..." for a couple seconds, and then 4) a blank.

In either version, this config ...

(agetty-service (agetty-configuration (tty "ttyS1")
                (baud-rate "115200")))

... causes a login prompt to be raised on ttyS1 which, on my system, is
mapped to IPMI Serial over Lan (SOL). However recently you said ...

On 02/15/2018 at 15:54 Danny Milosavljevic writes:

> In the long run please remove your agetty-service, it should automatically appear
> (it recovers the settings from the "console" kernel-argument).

So I tried that with a build from today (guix (GNU Guix)
0.13.0.5116-e272), and *no login* is raised on ttyS1 (My G46, sys.scm
attached).

However, if I *ignore your advice* a login prompt *is raised* on ttyS1
(My G45).

So, IIUC, it's not working the way you said it would, but it's not a
problem for me because I can just use the agetty-service.

Not sure your questions are still relevant, but here is what I see ...

On 02/17/2018 at 17:05 Danny Milosavljevic writes:

> What does
>
> stty -F /dev/ttyS1
>
> say?

g1@g1 ~/www$ sudo stty -F /dev/ttyS1
speed 115200 baud; line = 0;
-brkint -imaxbel

On 02/17/2018 at 17:04 Danny Milosavljevic writes:

> Huh, please try
>
> strace -f agetty /dev/ttyS1 >log 2>&1
>
> and send the log to the list...

(log.gz attached)

HTH - George


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;;; GuixSD headless server
(use-modules (gnu))
(use-service-modules networking ssh)
(use-package-modules
 admin
 base                 ; glibc-utf8-locales
 certs
 cups
 disk
 emacs
 freeipmi
 linux                 ; mdadm
 virtualization        ; qemu
 rsync
 screen
 ssh
 version-control       ; git
 wget
 xorg                  ; xauth
 )
(operating-system
 (host-name "g1")
 (timezone "America/New_York")
 (locale "en_US.utf8")
 (kernel-arguments '("console=ttyS1,115200"))
 ;; RAID1 root : NVMe M.2SSD + 2 HDs
 (bootloader (grub-configuration (target "/dev/nvme0n1")
				 (terminal-outputs '(console))
				 (terminal-inputs '(serial console))
				 (serial-speed 115200)
				 ))
 (initrd (lambda (file-systems . rest) (apply base-initrd file-systems
					      #:extra-modules '("raid1")
					      rest)))
 (mapped-devices (list (mapped-device
			(source '("/dev/nvme0n1p1" "/dev/sda1" "/dev/sdb1"))
			(target "/dev/md3")
			(type raid-device-mapping))))
 (file-systems (cons (file-system
		      (title 'device)
		      (device "/dev/md3")
		      (mount-point "/")
		      (type "ext4")
		      (dependencies mapped-devices))
		     %base-file-systems))
 (swap-devices '("/dev/nvme0n1p2" ))
 (users (cons* (user-account (name "g1")
			     (group "users")
			     (supplementary-groups '("wheel" "kvm"))
			     (home-directory (string-append "/home/" name)))
	       (user-account (name "admin")
			     (group "users")
			     (supplementary-groups '("wheel" "kvm"))
			     (home-directory (string-append "/home/" name)))
	       %base-user-accounts))
 (packages (cons*
	    cups
	    emacs-no-x-toolkit
	    emacs-guix
	    emacs-zenburn-theme
	    freeipmi
	    git
	    glibc-utf8-locales
	    gnu-make
	    mdadm
	    magit
	    nss-certs ;for HTTPS access
	    openssh
	    parted
	    qemu
	    rsync
	    screen
	    smartmontools
	    tree
	    wget
	    xauth
	    %base-packages))
 (services (cons* (dhcp-client-service)
		  (ntp-service)
		  (service openssh-service-type (openssh-configuration
						 (x11-forwarding? #t)))
		  %base-services)))