<div class="gmail_quote">On Mon, Nov 30, 2009 at 8:50 AM, David N. Lombard <span dir="ltr"><<a href="mailto:dnlombar@ichips.intel.com">dnlombar@ichips.intel.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">
<div class="im">On Mon, Nov 30, 2009 at 12:57:40AM -0700, Bernhard Walle wrote:<br>
><br>
> Mayank Kaushik schrieb:<br>
> ><br>
> > Is it something in the nvidia driver that's causing this to not work?<br>
> > Any clues on what's going wrong, or how I can debug this further?<br>
><br>
> You should attach a serial console to debug that. Is that possible on<br>
> your system. It's also possible to use a USB-to-RS232 converter on the<br>
> machine that should be debugged. However, that only works after the USB<br>
> drivers have been loaded, so much later than a real serial console.<br>
<br>
</div>A normal serial console will do for this particular task, but when you need<br>
very early debugging, there's also a "USB debug" cable. AFAICT, this is a<br>
sole-source item from Ajays Technology and only sold at<br>
<<a href="http://www.semiconductorstore.com/cart/pc/viewprd.asp?idProduct=12083" target="_blank">http://www.semiconductorstore.com/cart/pc/viewprd.asp?idProduct=12083</a>><br>
<br>
See Documentation/x86/earlyprintk.txt on using the device...<br>
<br>
It's on my XMAS wish list ;)<br>
</blockquote></div><br>Thanks, there should be one of those lying around at work, I'll give it a try.<br clear="all"><br>thanks,<br>Mayank<br>