From owner-freebsd-questions@freebsd.org Wed May 20 15:51:37 2020 Return-Path: Delivered-To: freebsd-questions@mailman.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mailman.nyi.freebsd.org (Postfix) with ESMTP id 6222C2DD263 for ; Wed, 20 May 2020 15:51:37 +0000 (UTC) (envelope-from tundra@tundraware.com) Received: from oceanview.tundraware.com (oceanview.tundraware.com [45.55.60.57]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (Client CN "mailman.tundraware.com", Issuer "mailman.tundraware.com" (not verified)) by mx1.freebsd.org (Postfix) with ESMTPS id 49Ry0m0fKWz4MqS for ; Wed, 20 May 2020 15:51:35 +0000 (UTC) (envelope-from tundra@tundraware.com) Received: from [192.168.0.2] (ozzie.tundraware.com [75.145.138.73]) (authenticated bits=0) by oceanview.tundraware.com (8.15.2/8.15.2) with ESMTPSA id 04KFoEku005473 (version=TLSv1.2 cipher=DHE-RSA-AES128-SHA bits=128 verify=NO) for ; Wed, 20 May 2020 10:50:15 -0500 (CDT) (envelope-from tundra@tundraware.com) Subject: Re: OT: Weird Hardware Problem From: Tim Daneliuk To: FreeBSD Mailing List References: <0a9f810d-7b4b-f4e6-4b7c-716044a9cf69@tundraware.com> Autocrypt: addr=tundra@tundraware.com; 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Linux x86_64; rv:68.0) Gecko/20100101 Thunderbird/68.7.0 MIME-Version: 1.0 In-Reply-To: <0a9f810d-7b4b-f4e6-4b7c-716044a9cf69@tundraware.com> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.6.2 (oceanview.tundraware.com [45.55.60.57]); Wed, 20 May 2020 10:50:15 -0500 (CDT) X-TundraWare-MailScanner-Information: Please contact the ISP for more information X-TundraWare-MailScanner-ID: 04KFoEku005473 X-TundraWare-MailScanner: Found to be clean X-TundraWare-MailScanner-SpamCheck: not spam (whitelisted), SpamAssassin (not cached, timed out) X-TundraWare-MailScanner-From: tundra@tundraware.com X-Spam-Status: No X-Rspamd-Queue-Id: 49Ry0m0fKWz4MqS X-Spamd-Bar: / Authentication-Results: mx1.freebsd.org; dkim=none; dmarc=none; spf=pass (mx1.freebsd.org: domain of tundra@tundraware.com designates 45.55.60.57 as permitted sender) smtp.mailfrom=tundra@tundraware.com X-Spamd-Result: default: False [0.13 / 15.00]; RCVD_VIA_SMTP_AUTH(0.00)[]; ARC_NA(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; FROM_HAS_DN(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; R_SPF_ALLOW(-0.20)[+a]; MIME_GOOD(-0.10)[text/plain]; PREVIOUSLY_DELIVERED(0.00)[freebsd-questions@freebsd.org]; DMARC_NA(0.00)[tundraware.com]; NEURAL_SPAM_MEDIUM(0.47)[0.469]; RCPT_COUNT_ONE(0.00)[1]; TO_DN_ALL(0.00)[]; NEURAL_HAM_SHORT(-0.18)[-0.181]; NEURAL_SPAM_LONG(0.15)[0.145]; FROM_EQ_ENVFROM(0.00)[]; R_DKIM_NA(0.00)[]; MIME_TRACE(0.00)[0:+]; ASN(0.00)[asn:14061, ipnet:45.55.32.0/19, country:US]; RCVD_COUNT_TWO(0.00)[2]; RCVD_TLS_ALL(0.00)[] X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.33 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Wed, 20 May 2020 15:51:37 -0000 On 5/19/20 8:46 AM, Tim Daneliuk wrote: > I was recently given a Dell Inspiron 3847 which has an i7-4790 and 16G > of memory. Perfect for multibooting BSD and Linux. It needed a new power > supply but now that this is installed, it's exhibiting a very strange > problem. > > The machine will work for hours flawless and then - for no apparent reason - > reboot randomly. The former owner reports that this was also happening > when they last had it running Win8. All signs point to an inadequate power supply. When I initially got the machine, I had to replace the onboard supply because the fan bearings on it were bad and loud. The former owner reported that the machine had - in fact - been experiencing random reboots of late. I replaced the old supply with a "good" used 500W ATX supply and the reboot problem was still noted as above. This morning, I pulled the used supply and put the only new PS I have in stock - at 350W ATX unit - and tried to recreate the problem I'd been able to force consistently before during Linux install. Voila! It worked. Now I need to monitor this thing for the next day or so to ensure that the problem is - indeed gone. Interesting that a new 350W supply does the trick when an apparently working 500W didn't. As someone pointed out, this could well be old electrolytics not holding the rail voltage well under stress. ---------------------------------------------------------------------------- Tim Daneliuk tundra@tundraware.com PGP Key: http://www.tundraware.com/PGP/