From owner-freebsd-multimedia@FreeBSD.ORG Sat Apr 22 00:22:34 2006 Return-Path: X-Original-To: freebsd-multimedia@freebsd.org Delivered-To: freebsd-multimedia@freebsd.org Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 235E616A400 for ; Sat, 22 Apr 2006 00:22:34 +0000 (UTC) (envelope-from econn@nc.rr.com) Received: from ms-smtp-03.southeast.rr.com (ms-smtp-03.southeast.rr.com [24.25.9.102]) by mx1.FreeBSD.org (Postfix) with ESMTP id AEA9E43D46 for ; Sat, 22 Apr 2006 00:22:33 +0000 (GMT) (envelope-from econn@nc.rr.com) Received: from [192.168.0.11] (cpe-071-065-248-172.nc.res.rr.com [71.65.248.172]) by ms-smtp-03.southeast.rr.com (8.13.6/8.13.6) with ESMTP id k3M0MTwn026530; Fri, 21 Apr 2006 20:22:32 -0400 (EDT) Message-ID: <44497744.8010609@nc.rr.com> Date: Fri, 21 Apr 2006 20:22:28 -0400 From: Erin E Conn User-Agent: Thunderbird 1.5 (X11/20060409) MIME-Version: 1.0 To: "R. B. Riddick" References: <20060419054623.74788.qmail@web30301.mail.mud.yahoo.com> In-Reply-To: <20060419054623.74788.qmail@web30301.mail.mud.yahoo.com> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Virus-Scanned: Symantec AntiVirus Scan Engine Cc: freebsd-multimedia@freebsd.org Subject: Re: Rebooting problems with /dev/cxm0 X-BeenThere: freebsd-multimedia@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Multimedia discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Sat, 22 Apr 2006 00:22:34 -0000 > I had a similar problem with my Pentium 133MHz: > When I used "cat /dev/cxm0" and piped it via a NIC to another box, the pvr box > halted without rebooting (at least for some minutes - then i pushed the reset > button). Somehow it felt like the read requests from /dev/cxm0 must be issued > quite often and regularily and the read requests from /dev/cxm0 should not be > limited in size (1MB works fine, while 1 byte crashes almost immediately (e. g. > "dd if=/dev/cxm0 of=/dev/null bs=1 count=1000"))... Furthermore the power > saving features should be disabled in my box, I think (I did not test it > thoroughly - at least whenever the power saving started the box crashed, when I > read from /dev/cxm0 at that time)... :-) > > Since I split the reading from cxm0 and transfering to hard disc (partially via > network) in two processes, that use 8 or about 8 buffers (each 2MB or about > 2MB), I do not have this problem (61 days uptime... :-)) And each day at least > 3h of reading from /dev/cxm0 - at most days much more: 6h or so). > > Maybe that helps (e. g.: just try to do "dd if=/dev/cxm0 of=/dev/null bs=1m > count=1000"). I'm not quite sure I understand what is meant here. My machine does not crash when I try the above dd command, but that may also be simply because at a count of 1000 it's not accessing my card long enough for whatever condition is causing my machine to lock up to occur. I'm trying a longer count now and it has not crashed so far, but I'm not sure how to apply this to practical viewing. How are you splitting the reading into 2 processes, and are you able to watch live TV using this method? Also, I am not using the network in any capacity, everything is happening locally on one machine. --Erin