Subject: Re: How to change serial baud rate on already installed bootblocks
To: None <port-i386@netbsd.org>
From: Job Hanssen <job.hanssen@xs4all.nl>
List: port-i386
Date: 09/04/2007 22:24:04
David Laight schreef:
> On Tue, Sep 04, 2007 at 12:11:22PM -0400, Thor Lancelot Simon wrote:
>> On Tue, Sep 04, 2007 at 08:23:57AM +0200, Job Hanssen wrote:
>>> Ok, I could have put that into words more clearly...
>>>
>>> What I tried to convey is that all kernel-output is at 38400 baud, while 
>>> the login-prompt is at 115200 baud...
>> Are you *sure* you didn't hardwire a serial console in your kernel
>> configuration?  If you did, it will ignore all console settings from
>> the bootblocks -- which sounds like exactly what's going on here.
> 
> That could be verified by setting the speed in the bootblocks to a
> lower value (eg 9600) and then verifying the speed the kernel messages
> are output at.

I just tried that. Even after setting the speed in the bootblocks to 9600 (and 
reboot the system), the kernel messages are still being output with a speed of 
38400 baud.

> I bet there is a bound check on the value that comes from the
> boot parameters somewhere.

Any idea where or what to look for?

Regards,

Job Hanssen