From owner-freebsd-questions@freebsd.org Thu Oct 22 15:14:17 2015 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 985D1A1A632 for ; Thu, 22 Oct 2015 15:14:17 +0000 (UTC) (envelope-from ml@netfence.it) Received: from mailman.ysv.freebsd.org (mailman.ysv.freebsd.org [IPv6:2001:1900:2254:206a::50:5]) by mx1.freebsd.org (Postfix) with ESMTP id 7E8BA139F for ; Thu, 22 Oct 2015 15:14:17 +0000 (UTC) (envelope-from ml@netfence.it) Received: by mailman.ysv.freebsd.org (Postfix) id 7B207A1A631; Thu, 22 Oct 2015 15:14:17 +0000 (UTC) Delivered-To: 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 7ABE5A1A630 for ; Thu, 22 Oct 2015 15:14:17 +0000 (UTC) (envelope-from ml@netfence.it) Received: from smtp208.alice.it (smtp208.alice.it [82.57.200.104]) by mx1.freebsd.org (Postfix) with ESMTP id 10E95139E for ; Thu, 22 Oct 2015 15:14:16 +0000 (UTC) (envelope-from ml@netfence.it) Received: from soth.ventu (79.32.6.132) by smtp208.alice.it (8.6.060.28) (authenticated as acanedi@alice.it) id 55BB68E10D8A33C1; Thu, 22 Oct 2015 17:14:14 +0200 Received: from guardian.ventu (bane.ventu [10.1.2.15]) (authenticated bits=0) by soth.ventu (8.15.2/8.14.9) with ESMTPSA id t9MFE8p2062225 (version=TLSv1 cipher=ECDHE-RSA-AES128-SHA bits=128 verify=NO); Thu, 22 Oct 2015 17:14:09 +0200 (CEST) (envelope-from ml@netfence.it) X-Authentication-Warning: soth.ventu: Host bane.ventu [10.1.2.15] claimed to be guardian.ventu Subject: Re: Spontaneous reboots with splash To: Mehmet Erol Sanliturk References: <5627D8B8.7030901@netfence.it> <5628CD2B.2000902@gmail.com> <5628CFA7.6040704@netfence.it> Cc: Ernie Luzar , "questions@freebsd.org" From: Andrea Venturoli Message-ID: <5628FD40.1030701@netfence.it> Date: Thu, 22 Oct 2015 17:14:08 +0200 User-Agent: Mozilla/5.0 (X11; FreeBSD amd64; rv:38.0) Gecko/20100101 Thunderbird/38.3.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 7bit X-Scanned-By: MIMEDefang 2.75 on 10.1.2.13 X-BeenThere: freebsd-questions@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: User questions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 22 Oct 2015 15:14:17 -0000 On 10/22/15 14:18, Mehmet Erol Sanliturk wrote: > If you have two identical computers with the same programs running : > One is working correctly , but other one is booting arbitrarily : I've got another identical box; I'll restore a dump on this and see if the behaviour is the same. > Therefore , there is a necessity to check that > > - processor is working correctly CPU Burn-in says yes. > - memories are working correctly Memtest 86+ says so. > - memory management chips are working correctly . I have no idea how to check. How do I do this? > Another problem may be a program which is causing generation of an > invalid address showing boot start code and jumping into it . This is > very easy for a i386 real mode program . In that case this program would be FreeBSD! That's why I'm asking here. > Another possibility is that a program is broken ( contains an invalid address ) > in HDD . When it starts to working , it jumps to that broken address and this > may start the boot . Would a userland program be allowed to do this??? bye & Thanks av.