From owner-freebsd-hackers Sun Sep 30 18:30:13 2001 Delivered-To: freebsd-hackers@freebsd.org Received: from acl.lanl.gov (acl.lanl.gov [128.165.147.1]) by hub.freebsd.org (Postfix) with SMTP id 0190537B40F for ; Sun, 30 Sep 2001 18:30:10 -0700 (PDT) Received: (qmail 193764 invoked from network); 30 Sep 2001 19:30:08 -0600 Received: from snaresland.acl.lanl.gov (128.165.147.113) by acl.lanl.gov with SMTP; 30 Sep 2001 19:30:08 -0600 Received: (qmail 19025 invoked by uid 3499); 30 Sep 2001 19:30:08 -0600 Received: from localhost (sendmail-bs@127.0.0.1) by localhost with SMTP; 30 Sep 2001 19:30:08 -0600 Date: Sun, 30 Sep 2001 19:30:08 -0600 (MDT) From: Ronald G Minnich X-X-Sender: To: Cc: , Subject: Re: power supplies In-Reply-To: <200109302347.f8UNlMn68050@freefall.freebsd.org> Message-ID: MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-freebsd-hackers@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG On Sun, 30 Sep 2001 babkin@FreeBSD.ORG wrote: > I had almost exactly the same experience with a Tyan motherboard, > excapt that it was not a network but video card in my case. > Unplugging the power cord from the machine between removing one > card and inserting another (or possibly the same) one has helped. > Though I don't know why it happens. I've seen similar stuff although have not (yet) fried a PS. I've had chipset lockup that requred unplugging AC for 30+ seconds before it was resolved. A simple power cycle with the power switch was not sufficient. Bear in mind that power supplies are never really "off" any more. There is always power applied to motherboards as long as AC is hot. I expect that sloppy enough design could result in these types of problems. Soft power off is not as perfect. ron To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-hackers" in the body of the message