From owner-freebsd-arm@FreeBSD.ORG Thu Dec 27 03:21:11 2012 Return-Path: Delivered-To: freebsd-arm@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 1ACD5D6E for ; Thu, 27 Dec 2012 03:21:11 +0000 (UTC) (envelope-from tim@kientzle.com) Received: from monday.kientzle.com (99-115-135-74.uvs.sntcca.sbcglobal.net [99.115.135.74]) by mx1.freebsd.org (Postfix) with ESMTP id DF6378FC12 for ; Thu, 27 Dec 2012 03:21:10 +0000 (UTC) Received: (from root@localhost) by monday.kientzle.com (8.14.4/8.14.4) id qBR3L1Kr079733; Thu, 27 Dec 2012 03:21:01 GMT (envelope-from tim@kientzle.com) Received: from [192.168.2.143] (CiscoE3000 [192.168.1.65]) by kientzle.com with SMTP id u8mf6jxh7gihhpj4n2w7chjpda; Thu, 27 Dec 2012 03:21:01 +0000 (UTC) (envelope-from tim@kientzle.com) Subject: Re: Raspberry Pi questions Mime-Version: 1.0 (Apple Message framework v1283) Content-Type: text/plain; charset=windows-1251 From: Tim Kientzle In-Reply-To: <1356534197.1144.38.camel@revolution.hippie.lan> Date: Wed, 26 Dec 2012 19:21:00 -0800 Content-Transfer-Encoding: 7bit Message-Id: <42B1C86B-F998-48DF-AA85-BB5250172E95@kientzle.com> References: <1356466883.1144.8.camel@revolution.hippie.lan> <08125E73-C46A-4DDF-BFD8-59D5B86136B8@bluezbox.com> <1356476778.1144.20.camel@revolution.hippie.lan> <0F630E03-7A0C-4D56-A580-C7A9ABD2CB0C@bluezbox.com> <1356479705.1144.23.camel@revolution.hippie.lan> <1356534197.1144.38.camel@revolution.hippie.lan> To: Ian Lepore X-Mailer: Apple Mail (2.1283) Cc: freebsd-arm@freebsd.org X-BeenThere: freebsd-arm@freebsd.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: Porting FreeBSD to the StrongARM Processor List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 27 Dec 2012 03:21:11 -0000 On Dec 26, 2012, at 7:03 AM, Ian Lepore wrote: > >> 2) Random failure to mount root. >> >> This is weird. If I insert the SD card into my Mac and open >> the MSDOS partition, then eject, the card will boot (sort of, >> see below). Otherwise, the kernel can't mount root. I'm >> entirely baffled. >> > > I had something like this happen several times yesterday. Most of the > time it boots fine, sometimes it fails to mount root from the sdcard, > but then it works on a reboot. I also saw the mmcsd0 driver ident line > say the bus was running at 50mhz several times, and I'm pretty sure I > wasn't using any SDHC cards, but that also wasn't the problem I was > pursuing so I didn't pay close attention. > > Of course, that doesn't seem to intersect with what you describe very > much at all, unless touching the card on the Mac wasn't really a cure, > it was just some misleading coincidence going on. Apparently it was just coincidence (that happened two times in a row!). I just tested a few more times and it now mounts root or not randomly even without mounting elsewhere in the middle. But I do see the correlation with probing the card at 25MHz (works) or 50MHz (fails). Tim