From mboxrd@z Thu Jan  1 00:00:00 1970
From: Mark H Weaver <mhw@netris.org>
Subject: Re: Coming up with a generic kernel config
Date: Fri, 27 Jun 2014 00:20:46 -0400
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References: <87vbrooko1.fsf@gnu.org> <53AB279B.9080606@totakura.in>
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In-Reply-To: <87vbron2yn.fsf@gnu.org> ("Ludovic
	\=\?utf-8\?Q\?Court\=C3\=A8s\=22'\?\=
	\=\?utf-8\?Q\?s\?\= message of "Wed, 25 Jun 2014 22:34:08 +0200")
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To: Ludovic =?utf-8?Q?Court=C3=A8s?= <ludo@gnu.org>
Cc: guix-devel@gnu.org

ludo@gnu.org (Ludovic Court=C3=A8s) writes:

> Sree Harsha Totakura <sreeharsha@totakura.in> skribis:
>
>> On 06/25/2014 09:26 PM, Ludovic Court=C3=A8s wrote:
>>> 1. Serial console is unavailable when booting.  I thought that=E2=80=99=
d be
>>>      addressed by explicitly setting CONFIG_SERIAL_8250=3Dy etc. (see
>>>      below for the list), but that=E2=80=99s not enough.  What am I mis=
sing?
>>
>> My kernel config has the following for serial console:
>> CONFIG_SERIAL_NONSTANDARD=3Dy
>> CONFIG_SERIAL_8250=3Dy
>> CONFIG_SERIAL_8250_PNP=3Dy
>> CONFIG_SERIAL_8250_CONSOLE=3Dy
>> CONFIG_SERIAL_8250_DMA=3Dy
>> CONFIG_SERIAL_8250_PCI=3Dy
>> CONFIG_SERIAL_8250_EXTENDED=3Dy
>> CONFIG_SERIAL_8250_MANY_PORTS=3Dy
>> CONFIG_SERIAL_8250_SHARE_IRQ=3Dy
>> CONFIG_SERIAL_8250_RSA=3Dy
>> CONFIG_SERIAL_CORE=3Dy
>> CONFIG_SERIAL_CORE_CONSOLE=3Dy
>
> The one I built has all these as well.  :-/

I think you need to pass something like "console=3DttyS0" as a kernel
command line option.  See Documentation/serial-console.txt in the
linux-libre source tree.

     Mark