On 02/14/2017 at 19:24 Leo Famulari writes:
> On Tue, Feb 14, 2017 at 07:12:44PM -0500, Leo Famulari wrote:
>> * gnu/services/base.scm (<agetty-configuration>): New record type.
>> (agetty-shepherd-service, agetty-service): New procedures.
>> (agetty-service-type): New variable.
>
> My intention is to get a serial tty, for example /dev/ttyS0, so that I
> can install GuixSD on a device that lacks any graphical display
> interfaces:
[...
> However, it doesn't work when I boot my physical device with the same
> installer image.
>
> When I connect to my physical device using the Keyspan USA-19H
> serial-to-USB converter, I can watch the system boot, but Shepherd never
> reports that the 'term-ttyS0' service has started, and I never see the
> MOTD or login prompt.
>
> Any advice or debugging ideas?
Hi Leo,
I'm very happy to see you doing this. I got agetty working on IPMI
serial over LAN (SOL) on a ASRock MT-C224 motherboard as follows:
I made these changes in GRUB.scm ...
diff --git a/gnu/system/grub.scm b/gnu/system/grub.scm
index b18b8be6d..e68cec7f4 100644
--- a/gnu/system/grub.scm
+++ b/gnu/system/grub.scm
@@ -197,7 +197,8 @@ system string---e.g., \"x86_64-linux\"."
insmod efi_uga
fi
- terminal_output gfxterm
+ serial --unit=0 --speed=115200
+ terminal_input serial console; terminal_output console
"
""))
I found the serial port like so ...
dmesg | grep tty
[ 0.000000] Command line:
BOOT_IMAGE=/gnu/store/ksigckplbh1669iy62pqa17j7sid9vmw-linux-libre-4.9.9/bzImage
--root=/dev/md3 --system=/gnu/store/ssh2kjijcg7fvfaafmn4jj0chkmzaxzr-system
--load=/gnu/store/ssh2kjijcg7fvfaafmn4jj0chkmzaxzr-system/boot
console=ttyS1,115200
[ 0.000000] Kernel command line:
BOOT_IMAGE=/gnu/store/ksigckplbh1669iy62pqa17j7sid9vmw-linux-libre-4.9.9/bzImage
--root=/dev/md3 --system=/gnu/store/ssh2kjijcg7fvfaafmn4jj0chkmzaxzr-system
--load=/gnu/store/ssh2kjijcg7fvfaafmn4jj0chkmzaxzr-system/boot
console=ttyS1,115200
[ 0.000000] console [ttyS1] enabled
[ 3.622999] 00:07: ttyS1 at I/O 0x2f8 (irq = 3, base_baud = 115200)
is a 16550A
... I installed the shadow package and I did this ...
agetty ttyS1 -l /root/.guix-profile/bin/login &
And I can log in, run screen and run emacs.
FWIW, there is no mention in sheperd.log of the serial port.
HTH, George
