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Date:   Thu, 2 Nov 2017 17:53:22 +0100
From:   Greg KH <>
To:     Paul Menzel <>
Subject: Re: How to enable output to serial console at run-time?

On Thu, Nov 02, 2017 at 04:39:36PM +0100, Paul Menzel wrote:
> Dear Linux folks,
> If I want to output the Linux kernel messages to the serial console, but the
> `console=ttyS…` line is missing on the Linux command line, is there a way to
> activate that during run-time by, for example, using the sysfs interface?

Why not change the command line to enable it properly?


greg k-h

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