From mboxrd@z Thu Jan  1 00:00:00 1970
From: =?UTF-8?Q?Roger_Pau_Monn=c3=a9?= <roger.pau@citrix.com>
Subject: Re: Garbled serial console output
Date: Thu, 17 Dec 2015 10:23:39 +0100
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To: Dario Faggioli <dario.faggioli@citrix.com>, Harmandeep Kaur <write.harmandeep@gmail.com>, xen-devel@lists.xenproject.org
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El 17/12/15 a les 10.06, Dario Faggioli ha escrit:
> On Thu, 2015-12-17 at 11:58 +0530, Harmandeep Kaur wrote:
>> Hi,
>>
> Hello Harmandeep,
> 
>> I tried to setup xen serial console with this guide,
>> http://wiki.xen.org/wiki/Xen_Serial_Console
>>
>> I am using RS232 -USB cable for this purpose.
>> I am on Ubuntu 15.10 (4.2.0-19-generic).
>>
>> xl info http://paste2.org/F2UgY5yz
>>
>> My output is garbled.
>> http://paste2.org/tZveaAGU
>>
> Ok. You also want to say what program, and with what
> configuration/parameters, you are using to view the serial line output.
> 
> From what you said on IRC, I think that is this:
> 
>  sudo screen /dev/ttyUSB8 115200
> 
> is that correct?
> 
> I don't have many ideas about what could cause the issue, and how to
> fix it. Every time I've seen something similar to that it was due to:
>  - mismatch between the baud rate specified in screen command line and 
>    the one configured for Xen's console
>  - more than one screen session "attached" to the serial line
> 
> So, I'd first of all double check these.
> 
> You can also try something else than screen (I'm sure there are dozens
> of terminal emulators on Ubuntu :-)), and see what happens.

FWIW, I've used screen in the past to connect to serial consoles and I
think cu is better (it doesn't have an internal scrollback buffer, and
doesn't trap Ctrl+A).

cu -l /dev/ttyUSB8 -s 115200

Roger.