console debugging without a serial line

[Rajat Sharma]

If virtual machine is feasible in debug environment, there is no need
even for serial port. For example, following blog shows setting up
kgdb with Sun Virtual Box:

http://fotis.loukos.me/blog/?p=25

It actually is helpful in my projects.

Rajat

On Thu, Mar 24, 2011 at 3:25 AM, julie Sullivan
<kernelmail.jms at gmail.com> wrote:
> Hi list
> On linux-kernel today there were a couple of interesting tips for
> debugging the kernel from a console in the absence of a serial port. I
> thought this might be useful/interesting to someone here (it was to
> me) so here's the link:
>
> https://lkml.org/lkml/2011/3/23/1
>
> Andi Kleen mentions the following:
>
>>There is also USB debugport, but you need a quite expensive cable
>>(~$100) for it. Usually it only works on one of the USB ports.
>
> Googling for 'USB Debugport' found this, which also might be useful:
>
> http://www.coreboot.org/EHCI_Debug_Port#AMIDebug_RX
>
> Does anyone (who might also be interested in reading this article)
> know if the 'Ajays NET20DC USB Debug Device' mentioned in this article
> might be the 'quite expensive cable' mentioned by Andi? (I saw one of
> these listed for $89.)  Apart from generally coming in handy, I have a
> netbook I'm thinking of sacrificing as a kernel testbox in the future
> which I'm sure doesn't have a serial port... (yep, I think that's a
> really great excuse for buying yet another new funky device :-)  )
>
> Cheers
> Julie
>
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