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Sat, 12 Nov 2016 15:32:29 +0000 Received: from VI1PR02MB0974.eurprd02.prod.outlook.com ([10.163.162.28]) by VI1PR02MB0974.eurprd02.prod.outlook.com ([10.163.162.28]) with mapi id 15.01.0707.015; Sat, 12 Nov 2016 15:32:29 +0000 From: Manish Jain To: "freebsd-questions@freebsd.org" , "matthew@FreeBSD.org" Subject: Re: Need help to find out what caused system crash Thread-Topic: Need help to find out what caused system crash Thread-Index: AQHSPPn6/RLuOygwVEqtKxhTCRQCXA== Date: Sat, 12 Nov 2016 15:32:29 +0000 Message-ID: References: In-Reply-To: Accept-Language: en-GB, en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: freebsd.org; dkim=none (message not signed) header.d=none;freebsd.org; dmarc=none action=none header.from=hotmail.com; x-incomingtopheadermarker: OriginalChecksum:; UpperCasedChecksum:; SizeAsReceived:7324; Count:36 x-ms-exchange-messagesentrepresentingtype: 1 x-incomingheadercount: 36 x-eopattributedmessage: 0 x-microsoft-exchange-diagnostics: 1; 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charset="Windows-1252" Content-ID: <45E2497A2B306A469B0AB1D2357E79F2@eurprd02.prod.outlook.com> Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 X-OriginatorOrg: hotmail.com X-MS-Exchange-CrossTenant-originalarrivaltime: 12 Nov 2016 15:32:29.5448 (UTC) X-MS-Exchange-CrossTenant-fromentityheader: Internet X-MS-Exchange-CrossTenant-id: 84df9e7f-e9f6-40af-b435-aaaaaaaaaaaa X-MS-Exchange-Transport-CrossTenantHeadersStamped: HE1EUR02HT098 X-OriginalArrivalTime: 12 Nov 2016 15:32:32.0589 (UTC) FILETIME=[FC60C7D0:01D23CF9] 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: Sat, 12 Nov 2016 15:32:39 -0000 On 11/12/16 17:30, freebsd-questions-request@freebsd.org wrote: > Your best bet is to raise a PR with all the detail you can. > freebsd-questions@... tends not to be read by all of the kernel > developers who might be in a position to help you out. > > If you can, try and generate a backtrace according to the instructions in > > https://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/ker= neldebug-gdb.html Hi Matthew, Thanks for replying. 1) As for raising a PR, do you mean I should create an issue at the=20 FreeBSD bugzilla ? 2) The URL you have suggested for generating a backtrace says I have to=20 use kernel.debug. But 'locate kernel.debug' produces no output on my system= . 3) In case I cannot raise an effective PR, I am trying to guess what=20 could have been the problem. This machine is recovering from the effects of a supremely=20 malfunctioning graphics card (NVidia, for which the OEM Gigabyte has=20 generously declined any support for anything other than Windows). Replacing that card with a brand new Sapphire Radeon has greatly=20 improved things. This system worked well for 2 days straight with the=20 new card, and then suddenly crashed once. Just yesterday, I noticed that=20 the CPU temperature was mind-boggling. Even with low-to-moderate load,=20 my system was generally in the 80 deg Celsius band, with 82 being=20 touched every now and then. I did not want that situation to continue,=20 so I ordered a new Cooler Master cooler+fan. Installing the new fan a=20 few minutes back has brought down CPU temperature crashing down to 46 deg C= . It will be a few days before I can be sure whether the fan switch has=20 improved this machine's prospects. a) Do you think the high CPU temperature could have been responsible for=20 the crash ? b) Is there an application under ports which can display CPU temperature=20 ? I don't want to be rebooting the system just to have a look into the=20 BIOS stats for that. Thanks again Manish Jain