From owner-freebsd-questions@freebsd.org Fri Dec 16 12:08:09 2016 Return-Path: Delivered-To: freebsd-questions@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 61806C828D5 for ; Fri, 16 Dec 2016 12:08:09 +0000 (UTC) (envelope-from matthew@FreeBSD.org) Received: from smtp.infracaninophile.co.uk (smtp.infracaninophile.co.uk [IPv6:2001:8b0:151:1:c4ea:bd49:619b:6cb3]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "smtp.infracaninophile.co.uk", Issuer "infracaninophile.co.uk" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id EAA1E1887 for ; Fri, 16 Dec 2016 12:08:08 +0000 (UTC) (envelope-from matthew@FreeBSD.org) Received: from liminal.local (unknown [IPv6:2001:8b0:151:1:1c1d:86a1:a200:b700]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: m.seaman@infracaninophile.co.uk) by smtp.infracaninophile.co.uk (Postfix) with ESMTPSA id E50E97C95 for ; Fri, 16 Dec 2016 12:08:03 +0000 (UTC) Authentication-Results: smtp.infracaninophile.co.uk; dmarc=none header.from=FreeBSD.org Authentication-Results: smtp.infracaninophile.co.uk/E50E97C95; dkim=none; dkim-atps=neutral Subject: Re: HW defect or system failure To: freebsd-questions@freebsd.org References: <20161216105453.7nxo2qrxfnwgrs2n@bsd.de> From: Matthew Seaman Message-ID: <7e56c2b4-f809-94b5-19f1-c521062a6488@FreeBSD.org> Date: Fri, 16 Dec 2016 12:07:57 +0000 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.12; rv:45.0) Gecko/20100101 Thunderbird/45.5.1 MIME-Version: 1.0 In-Reply-To: <20161216105453.7nxo2qrxfnwgrs2n@bsd.de> Content-Type: multipart/signed; micalg=pgp-sha512; protocol="application/pgp-signature"; boundary="LSQhnPTqta3jtC2AvBbGdSAAU5fx76pSj" X-Spam-Status: No, score=-0.4 required=5.0 tests=BAYES_00,RDNS_NONE, SPF_SOFTFAIL autolearn=no autolearn_force=no version=3.4.1 X-Spam-Checker-Version: SpamAssassin 3.4.1 (2015-04-28) on smtp.infracaninophile.co.uk X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 16 Dec 2016 12:08:09 -0000 This is an OpenPGP/MIME signed message (RFC 4880 and 3156) --LSQhnPTqta3jtC2AvBbGdSAAU5fx76pSj Content-Type: multipart/mixed; boundary="1X4OSdVNNa6NgT9SLj22kR4JRP4iew1bp"; protected-headers="v1" From: Matthew Seaman To: freebsd-questions@freebsd.org Message-ID: <7e56c2b4-f809-94b5-19f1-c521062a6488@FreeBSD.org> Subject: Re: HW defect or system failure References: <20161216105453.7nxo2qrxfnwgrs2n@bsd.de> In-Reply-To: <20161216105453.7nxo2qrxfnwgrs2n@bsd.de> --1X4OSdVNNa6NgT9SLj22kR4JRP4iew1bp Content-Type: text/plain; charset=windows-1252 Content-Transfer-Encoding: quoted-printable On 16/12/2016 10:54, J wrote: > i got this weird problem of my notebook randomly rebooting. > How would i find out if it is a kernel panic or a hardware failure? What changed? If the rebooting started spontaneously, and not in a way obviously related to your upgrading the OS or packages, then it is probably hardware. Have you tried cleaning out and de-fluffing any air intakes or fans? A common cause of rebooting like this is due to overheating. Making sure the cooling airflow is unobstructed helps a lot. You can try running diagnostic tools like memtest86 -- these will detect many problems with RAM or CPU caches, which would confirm hardware as the cause. If memtest86 doesn't find anything, that doesn't mean your hardware is definitely OK -- there are ways that hardware can fail that memtest86 can't detect. Cheers, Matthew --1X4OSdVNNa6NgT9SLj22kR4JRP4iew1bp-- --LSQhnPTqta3jtC2AvBbGdSAAU5fx76pSj Content-Type: application/pgp-signature; name="signature.asc" Content-Description: OpenPGP digital signature Content-Disposition: attachment; filename="signature.asc" -----BEGIN PGP SIGNATURE----- iQJ8BAEBCgBmBQJYU9kjXxSAAAAAAC4AKGlzc3Vlci1mcHJAbm90YXRpb25zLm9w ZW5wZ3AuZmlmdGhob3JzZW1hbi5uZXQ2NTNBNjhCOTEzQTRFNkNGM0UxRTEzMjZC QjIzQUY1MThFMUE0MDEzAAoJELsjr1GOGkATyq4P/3ZczKwWO5dN67jhDh5aAtxN pc+R+HJ50InbERSID0B7Go2b+27mSIGkJPBO/gmAPjMB5PJmqacChHpM7dBm4nRh uYSAxp7dZtp5qFb22gEp0sgLD4SDCUwrtaPVIEqcbO9FdPP3lyVeyt6iIfBuNMXJ DkD0TFu5cblBfPxGitXOgAiE39FtfaCjAPL3tLqq5iqP7+4kXPOK9XZ7so91YtB2 3j/c5q7o9Ad/jDinBwebX7A9EDIot0NaQo5PgodW9o3Cc5O+V+5N/9o+JDCM0Sva yg4YlOC0JoDA2hM0h0/GnorXm9bGZk6BGz834qB9vEagt8rMyGB0BOfpF1DdgPkX DXKkLlYfHCZjCm/xPj1DMauIbfR3ePkh6vNzUZ41nToEJNF1a+NhMe2xNExMqKtA 2LGDZTT9XO67BUdoVFFH2xEZeZS5VtdO1/i2576sJUen78DndI70sk+TWY3VwDaV qbAiOnGmL2uY08CYcYCfpVG21brNUsizidzy1rnljR1yzOzj2iTMUWUZN2gmRuat 6I83d9lAJuxM4gDWwbCK4Jce5TWtALuxahNUWfHXbSgZNOKkaZB3Yef6KbfiyP2Z GOWhQb8rzsLK67nYs45/7XyDdPk7qUWTqVZmkVglaBFp2zmIVfXTUn+GOcyleBHX 9BNajCy/q+p2pKwqsgr1 =RQ65 -----END PGP SIGNATURE----- --LSQhnPTqta3jtC2AvBbGdSAAU5fx76pSj--