From owner-freebsd-questions@FreeBSD.ORG Mon Mar 12 16:57:11 2012 Return-Path: Delivered-To: freebsd-questions@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [69.147.83.52]) by hub.freebsd.org (Postfix) with ESMTP id 6A967106566C for ; Mon, 12 Mar 2012 16:57:11 +0000 (UTC) (envelope-from matthew@FreeBSD.org) Received: from smtp.infracaninophile.co.uk (smtp6.infracaninophile.co.uk [IPv6:2001:8b0:151:1:3cd3:cd67:fafa:3d78]) by mx1.freebsd.org (Postfix) with ESMTP id E86E28FC12 for ; Mon, 12 Mar 2012 16:57:10 +0000 (UTC) Received: from seedling.black-earth.co.uk (seedling.black-earth.co.uk [IPv6:2001:8b0:151:1:fa1e:dfff:feda:c0bb]) (authenticated bits=0) by smtp.infracaninophile.co.uk (8.14.5/8.14.5) with ESMTP id q2CGv7Yq082340 (version=TLSv1/SSLv3 cipher=DHE-RSA-CAMELLIA256-SHA bits=256 verify=NO) for ; Mon, 12 Mar 2012 16:57:07 GMT (envelope-from matthew@FreeBSD.org) X-DKIM: OpenDKIM Filter v2.5.0 smtp.infracaninophile.co.uk q2CGv7Yq082340 Authentication-Results: smtp.infracaninophile.co.uk/q2CGv7Yq082340; dkim=none (no signature); dkim-adsp=none Message-ID: <4F5E2ADB.6020104@FreeBSD.org> Date: Mon, 12 Mar 2012 16:56:59 +0000 From: Matthew Seaman User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:10.0.2) Gecko/20120216 Thunderbird/10.0.2 MIME-Version: 1.0 To: freebsd-questions@FreeBSD.org References: <4F5E031D.5060203@gmail.com> In-Reply-To: <4F5E031D.5060203@gmail.com> X-Enigmail-Version: 1.3.5 Content-Type: multipart/signed; micalg=pgp-sha1; protocol="application/pgp-signature"; boundary="------------enigB62983D561C68FBACCCB0DC4" X-Virus-Scanned: clamav-milter 0.97.3 at lucid-nonsense.infracaninophile.co.uk X-Virus-Status: Clean X-Spam-Status: No, score=-2.9 required=5.0 tests=ALL_TRUSTED,AWL,BAYES_00 autolearn=ham version=3.3.2 X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on lucid-nonsense.infracaninophile.co.uk Cc: Subject: Re: 9.0 spontaneously reboots X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 12 Mar 2012 16:57:11 -0000 This is an OpenPGP/MIME signed message (RFC 2440 and 3156) --------------enigB62983D561C68FBACCCB0DC4 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable On 12/03/2012 14:07, Volodymyr Kostyrko wrote: > What should I blame now? Is it some programming error or should I > continue with testing/changing motherboard and cpu? Instability that appears spontaneously (and especially if it persists across system updates) is almost always caused by hardware problems. So, yes, carry on swapping out components until you can isolate where the problem is. Some common hardware problems which might result in the problems you've seen: * PSU going flakey. If you have the right measuring equipment, this is pretty easy to detect by looking at the output voltages -- if they've drifted out of spec, or if you've got mains frequency jitter leaking through then its no wonder your system crashes. * Similarly, if the crashing is associated with system load, (particularly at startup, when things are happening like disks spinning up) this can indicate a power supply fading under load. That can happen due to age, or because you've been adding extra hardware and haven't considered the power requirements. * The other reason for crashing under load is overheating. Sometimes this can be cured easily by cleaning dust out of vents and heat-sinks. Check too for fans either seized or running slowly. * You may need to clean off any old heat-sink compound and re-apply a fresh layer, especially if you've taken CPU coolers off at some point. * There's also the old capacitor problem: electrolytic capacitors have a failure mode that generates some positive pressure inside them. This is detectable by the end of the capacitor being bowed out, rather than slightly concave. (Generally this means a new motherboard, although I've heard of people being able to solder in replacements successfully.) Other than that, try disconnecting and reconnecting peripherals like disks or DVDs and so forth in various combinations to test if that improves system stability. One faulty component can knock the whole machine over. Cheers, Matthew --=20 Dr Matthew J Seaman MA, D.Phil. PGP: http://www.infracaninophile.co.uk/pgpkey --------------enigB62983D561C68FBACCCB0DC4 Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- Version: GnuPG/MacGPG2 v2.0.16 (Darwin) Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org/ iEYEARECAAYFAk9eKuIACgkQ8Mjk52CukIw2vwCdEoQpzro1ael8CGd6Vf2rKn2u 52cAn2yBYco75r3cy1GtlDJtlaf06k/O =orQV -----END PGP SIGNATURE----- --------------enigB62983D561C68FBACCCB0DC4--