From owner-freebsd-stable@FreeBSD.ORG Fri Sep 10 02:36:49 2010 Return-Path: Delivered-To: freebsd-stable@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 12707106566C for ; Fri, 10 Sep 2010 02:36:49 +0000 (UTC) (envelope-from doconnor@gsoft.com.au) Received: from cain.gsoft.com.au (cain.gsoft.com.au [203.31.81.10]) by mx1.freebsd.org (Postfix) with ESMTP id 8EBE78FC16 for ; Fri, 10 Sep 2010 02:36:48 +0000 (UTC) Received: from ur.gsoft.com.au (Ur.gsoft.com.au [203.31.81.44]) (authenticated bits=0) by cain.gsoft.com.au (8.14.4/8.14.3) with ESMTP id o8A2aZNK039667 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=NO); Fri, 10 Sep 2010 12:06:40 +0930 (CST) (envelope-from doconnor@gsoft.com.au) Content-Type: text/plain; charset=us-ascii Mime-Version: 1.0 (Apple Message framework v1081) From: "Daniel O'Connor" Date: Fri, 10 Sep 2010 12:06:35 +0930 Content-Transfer-Encoding: quoted-printable Message-Id: To: freebsd-stable Stable X-Mailer: Apple Mail (2.1081) X-Spam-Score: -2.51 () ALL_TRUSTED,BAYES_00,T_RP_MATCHES_RCVD X-Scanned-By: MIMEDefang 2.67 on 203.31.81.10 Cc: "John H. Baldwin" Subject: Enabling MCA causes system hangs X-BeenThere: freebsd-stable@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Production branch of FreeBSD source code List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Fri, 10 Sep 2010 02:36:49 -0000 Hi, I recently tried enabling MCA (ie w.mca.enabled=3D1 in loader.conf) on = an 8.0-STABLE system and found that it would cause the system to hang = after a few minutes of uptime. The screen would go black and the monitor would turn off (regardless of = wether it was in X or not) and only a hard reset would bring it back. Also I found that quite often I had to power cycle the whole PC or the = BIOS wouldn't detect the hard disks on boot(!) after a hang. uname is.. FreeBSD midget.dons.net.au 8.0-STABLE FreeBSD 8.0-STABLE #6 r202903M: = Sun Jan 24 13:45:11 CST 2010 = darius@midget.dons.net.au:/usr/obj/usr/src/sys/MIDGET amd64 The motherboard is a Gigabyte GA-MA785GM-US2H with an Athlon II X2 240 = CPU & 4Gb of RAM. -- Daniel O'Connor software and network engineer for Genesis Software - http://www.gsoft.com.au "The nice thing about standards is that there are so many of them to choose from." -- Andrew Tanenbaum GPG Fingerprint - 5596 B766 97C0 0E94 4347 295E E593 DC20 7B3F CE8C