From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from ovro.ovro.caltech.edu (ovro.ovro.caltech.edu [192.100.16.2]) by ozlabs.org (Postfix) with ESMTP id 6F05F2C007A for ; Fri, 9 Aug 2013 08:10:47 +1000 (EST) Message-ID: <52041765.30501@ovro.caltech.edu> Date: Thu, 08 Aug 2013 15:10:45 -0700 From: David Hawkins MIME-Version: 1.0 To: Peter LaDow Subject: Re: Failure to detect PCI card References: <20130805202559.0086e806@crub> <52000ACA.1010606@ovro.caltech.edu> <520058E0.8080304@ovro.caltech.edu> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Cc: Anatolij Gustschin , linuxppc-dev@lists.ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Hi Pete, > For those that are interested, we did figure out what was going on. > Turns out that the clock buffer driving the PCI connector was, well, > less than adequate. With some cards, the load on the clock line was > large enough that the clock was in horrible shape. Fixing the clock > line and the card that failed to be recognized started working. For > the other cards that worked, the load on the clock line was > significantly less, but the clock was still marginal. > > Anyway, turned out to be a hardware issue. Thanks to all that helped! Thanks for posting that you solved the issue. The old engineering debug mantra ran true; check the power, then clocks, then debug :) Cheers, Dave