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Date:      Wed, 01 Mar 2017 19:05:09 -0700
From:      Ian Lepore <ian@freebsd.org>
To:        Oleksandr Tymoshenko <gonzo@id.bluezbox.com>, "Jayachandran C." <jchandra@FreeBSD.org>
Cc:        bob prohaska <fbsd@www.zefox.net>, Michael Tuexen <tuexen@fh-muenster.de>, freebsd-arm@freebsd.org
Subject:   Re: Odd-looking serial console prompt on RPI2
Message-ID:  <1488420309.60166.32.camel@freebsd.org>
In-Reply-To: <20170302020116.GA98466@bluezbox.com>
References:  <20170227195647.GA91329@www.zefox.net> <20170301200112.ymwkfd64tzz5f3b2@mutt-hbsd> <4194F030-4E5C-4EB6-82D7-FD725E3B7CEF@fh-muenster.de> <20170302000334.GA99403@www.zefox.net> <1488419304.60166.26.camel@freebsd.org> <20170302020116.GA98466@bluezbox.com>

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On Wed, 2017-03-01 at 18:01 -0800, Oleksandr Tymoshenko wrote:
> Ian Lepore (ian@freebsd.org) wrote:
> > 
> > On Wed, 2017-03-01 at 16:03 -0800, bob prohaska wrote:
> > > 
> > > On Wed, Mar 01, 2017 at 09:20:13PM +0100, Michael Tuexen wrote:
> > > > 
> > > > 
> > > > Interesting... Let us know what works and what doesn't...
> > > > 
> > > > Best regards
> > > > Michael
> > > > 
> > > As of FreeBSD 12.0-CURRENT (RPI2) #0 r314450: Wed Mar  1 14:48:26
> > > PST
> > > 2017
> > > the serial console is still corrupt (output truncated, input not
> > > echoed
> > > but treated like the enter key).  The serial console does seem to
> > > work
> > > with U-boot and loader, so I don't think it's the upstream
> > > hardware. 
> > > 
> > > The HDMI console looks normal and USB keyboard input seems to
> > > work.
> > > 
> > > There have been several updates to /usr/src/sys/dev/uart and it
> > > looks
> > > as if kernel updates are still coming. Maybe the job simply isn't
> > > done yet.
> > > 
> > > bob
> > > 
> > It seems like this might be caused by r314318.  Can someone having
> > this problem confirm if 314317 works and 314318 fails?
> Tested on my RPi2, 314317 - works, 314318 - broken
> 

CC'ing jchandra@.

I wonder if there is some bad interaction when the same uart is used as
a console and a tty?

-- Ian



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