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Date:      Sun, 26 Feb 2006 21:26:02 +0100
From:      Dimitry Andric <dimitry@andric.com>
To:        Ed Maste <emaste@phaedrus.sandvine.ca>
Cc:        stable@freebsd.org
Subject:   Re: RELENG_6: serial console drops back from 115200 to 9600 baud
Message-ID:  <44020EDA.1070609@andric.com>
In-Reply-To: <20060226021457.GB55658@sandvine.com>
References:  <4400D235.9030807@andric.com> <20060225225621.GA42888@sandvine.com> <4400E70F.2020902@andric.com> <20060226005712.GA48900@sandvine.com> <44010644.4000504@andric.com> <20060226021457.GB55658@sandvine.com>

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Ed Maste wrote:
> So I suspect that the following happens when you boot:
>=20
> - your BIOS sets the serial port to 9600

Yes.

> - boot0 does nothing with the serial pot

I'm using 'dangerously dedicated' disks, so it's only boot[12] that is us=
ed.

> - boot1/2 reads the -P in /boot.config and detects no keyboard, and
>   then sets the serial port to 9600 and the console to comconsole

Indeed, I never got the "/boot.config: -P" message on the serial console
before.  Now I get it, using updated boot blocks.

> - the loader detects that the serial port is enabled and is already
>   set to 9600

> Thus, I'm not surprised that you get a 9600 baud console without
> an rc.conf setting.  The thing that concerns me is your report that
> the console does not run at 115200 even if /boot/loader.conf
> contains comconsole_speed=3D"115200".

This turns out to be an error on my part, sorry to have you worried. :)
I'd accidentally put "console_speed=3D115200" in loader.conf.  With
"comconsole_speed=3D115200" and 9600 baud boot blocks, it works okay,
although you don't see any of the boot[12] messages, of course.

That's why installing 115200 baud boot blocks is still the better
solution for me; my BIOS doesn't have any possibility to set the COM
port speeds...



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