linux-kernel - Re: Problem with 8250_pnp Module and using ttyS0 as console

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Message-ID: <20080430180133.1e1f940b@core>
Date:	Wed, 30 Apr 2008 18:01:33 +0100
From:	Alan Cox <alan@...rguk.ukuu.org.uk>
To:	John Clark <jclark@...ricsystems.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Problem with 8250_pnp Module and using ttyS0 as console

On Wed, 30 Apr 2008 09:35:51 -0700
John Clark <jclark@...ricsystems.com> wrote:

> Linux version... at least as far back as 2.6.19 and upto and including 
> the latest
> one I've tested, 2.6.25.
> 
> 
> When the kernel has been configured to use ttyS0 as the console port, via
> modification of the boot command line, 'console=ttyS0,115200', the kernel
> ultimately traps with an exception, if the module "8250_pnp.ko" is loaded.
> 
> Removing this module eliminates the fault.
> 
> Is this a problem or a documented incompatibility?

Hard to tell without the trace. Can you capture the trace and let me
know. It's not supposed to give you an exception but we need to see the
exception to change that.

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