From nobody Wed Oct 2 10:00:52 2024 X-Original-To: questions@mlmmj.nyi.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2610:1c1:1:606c::19:1]) by mlmmj.nyi.freebsd.org (Postfix) with ESMTP id 4XJVgg0G6Tz5YJbQ for ; Wed, 02 Oct 2024 10:01:03 +0000 (UTC) (envelope-from matthew@FreeBSD.org) Received: from smtp.freebsd.org (smtp.freebsd.org [96.47.72.83]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256 client-signature RSA-PSS (4096 bits) client-digest SHA256) (Client CN "smtp.freebsd.org", Issuer "R10" (verified OK)) by mx1.freebsd.org (Postfix) with ESMTPS id 4XJVgf5cl0z4Fgm for ; Wed, 2 Oct 2024 10:01:02 +0000 (UTC) (envelope-from matthew@FreeBSD.org) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1727863262; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=iLzeBX4ZaeVvu2pn1KHH67NhlhJcSwi+eWErxE4SzQw=; b=t/9TDhqs/N8A7MSyQ5Z3Pdypzw/tGIEHihVRBGXQHBU4ghtpUJDCc41RAEqkaoqKV3VBqS PArvVEfa60K879WhqUc+ivO49BDFCCe8RfQh6Q0OTF7yT1JyHf4b6ZbJSGxx1B3ni6ylXz IM3PjQIbxJlm5AJu3MGEZjTnU8Dh6gOyW8AjQ8ldqIlpXJnb0538ypOdqo6J8qBpr/kwKX uq6SFr3oj1BMpM/KAq8FuYIZkzUKaRePudg439TbfJ0ZtLpFqqygQyxlBzeILm9oatseBs 4nUQRD2+2caxf/Hfca2ET2IlLmtf+Cf68crp9LC9OqjrKY2mQPVOfVhRXhCnsQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=freebsd.org; s=dkim; t=1727863262; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=iLzeBX4ZaeVvu2pn1KHH67NhlhJcSwi+eWErxE4SzQw=; b=FZ39BgfiMm2YnXFWsmXSV1SjUihCUOsBK5N1addZyDJDLb2fpPOOKzZe5VW19HtpAz0uO0 U5YEMH0VCdPhKT7AJC84/Gdfv741nTyPfz6JdAGpDvi29mfoV0W/rd0fXwfsbC6CqId06T nff0gQu7FCfPo0YU4uGtSTr51ihPPi6+4jCl+LDHLnRzKk/L51iHiGYH0YLbx6enJgjf0o ViRZaFmqvkl8rK3Kz6naWmlN1VY6ik5NHc7CvMDieGrF6kTyiAbqADn7qw1E4xedNge67J M6YaLSr95oXiqYevZuiEdLaZyDvCTMs/9qCht/jSVZ3jZ1ikgd2L09/+W8gYpA== ARC-Authentication-Results: i=1; smtp.infracaninophile.co.uk; dmarc=fail (p=none dis=none) header.from=FreeBSD.org ARC-Seal: i=1; s=dkim; d=freebsd.org; t=1727863262; a=rsa-sha256; cv=none; b=oMRvH6m7paza/PlPlu3zukyno1Th7yiCyDY+0ss/bOOe0SIdsHD9sKh9tuHieEjcT76h3s qZgO+uAPA/7oYFp/v/lPjtrdr/NK7CHq/6U8HPKCfWF8MRqD8hovxjdpJnSAKEvX1BgJRJ sZ2HrvOBY10Kp5aDBM3jc5zaUpZ3c6p/KqSYUobgc++Xhgkh+Q4LIOIk3GjfyeSrrve4oI cl+SffvzqG64UICQvZFtykwbmaV+qzElwJdJS2g8/RkqcP1V+J8I/5N3wws833zEb+NR1P jb4ri/5UdKsknxc5Qyg0Oast/23TIJ6ykVAYmRTVQbS64/AAmo7amAyoeiR8zg== Received: from smtp.infracaninophile.co.uk (smtp.infracaninophile.co.uk [81.2.117.100]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (Client did not present a certificate) (Authenticated sender: matthew/mail) by smtp.freebsd.org (Postfix) with ESMTPSA id 4XJVgf4crWzGDS for ; Wed, 2 Oct 2024 10:01:02 +0000 (UTC) (envelope-from matthew@FreeBSD.org) Received: from [IPV6:2001:8b0:151:1:50be:6b4d:f02e:b59d] (unknown [IPv6:2001:8b0:151:1:50be:6b4d:f02e:b59d]) (using TLSv1.3 with cipher TLS_AES_128_GCM_SHA256 (128/128 bits) key-exchange X25519 server-signature ECDSA (prime256v1) server-digest SHA256) (No client certificate requested) (Authenticated sender: m.seaman@infracaninophile.co.uk) by smtp.infracaninophile.co.uk (Postfix) with ESMTPSA id 33C767AD0 for ; Wed, 02 Oct 2024 11:01:00 +0100 (BST) Authentication-Results: smtp.infracaninophile.co.uk; dmarc=fail (p=none dis=none) header.from=FreeBSD.org Message-ID: <0192bcd7-b87e-49e5-885f-31d6ba0567ee@FreeBSD.org> Date: Wed, 2 Oct 2024 11:00:52 +0100 List-Id: User questions List-Archive: https://lists.freebsd.org/archives/freebsd-questions List-Help: List-Post: List-Subscribe: List-Unsubscribe: X-BeenThere: freebsd-questions@freebsd.org Sender: owner-freebsd-questions@FreeBSD.org MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: I can't get no crash dump To: questions@freebsd.org References: Content-Language: en-GB From: Matthew Seaman In-Reply-To: Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 01/10/2024 18:17, Frank Leonhardt wrote: > I've got a host that's mysteriously rebooting. There's no clue in the > logs. It's not doing much - it's just a gateway. Just every few hours, > it reboots. (It was a BSD 12 upgraded to 13, and it's been sitting there > as a standby gateway for ages with no problem - ask it to do a bit of > work and it gets in a strop). There may well not be any crash dump to find. An older box that starts suddenly rebooting is frequently down to hardware problems. Commonly: * Fans and cooling not working effectively * PSUs not putting out the expected voltages correctly In either of these cases, the system can just power off without warning. If you're lucky there might be something written to the console, or you might hear fans spinning up to max. Cleaning out any accumulated dust and making sure internal connectors are firmly seated might help. As will applying a new layer of CPU grease beneath the heatsink(s). To test if the PSU has gone flakey, you might be able to diagnose it by adroit use of a voltmeter, but usually the best test is to swap out for a known-good PSU. There are unfortunately other components that can fail and cause the effect you're seeing, but those tend towards the "replace the whole machine" sort of solutions. Good luck Matthew