Date: Fri, 16 Dec 2016 07:54:36 -0800 From: Mehmet Erol Sanliturk <m.e.sanliturk@gmail.com> To: Matthew Seaman <matthew@freebsd.org> Cc: FreeBSD Questions Mailing List <freebsd-questions@freebsd.org> Subject: Re: HW defect or system failure Message-ID: <CAOgwaMuj-8DHrS4-725VrGsvg2-jAHvjmVpJCAvAuwbfjEo85A@mail.gmail.com> In-Reply-To: <7e56c2b4-f809-94b5-19f1-c521062a6488@FreeBSD.org> References: <20161216105453.7nxo2qrxfnwgrs2n@bsd.de> <7e56c2b4-f809-94b5-19f1-c521062a6488@FreeBSD.org>
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On Fri, Dec 16, 2016 at 4:07 AM, Matthew Seaman <matthew@freebsd.org> wrote: > 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 > > > Additional to overheating , memory chip , BIOS setup , ... , caused reboots , the following may be considered after memory tests : Sometimes , an executable may be broken in HDD . When it is run , it may cause a reboot by accessing erroneously reboot code . Therefore , you may try another lively executable OS to understand reboots are deterministic or probabilistic before reinstalling the existing program(s) or OS . Mehmet Erol Sanliturk
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