From owner-freebsd-questions Tue Sep 10 8:37:45 2002 Delivered-To: freebsd-questions@freebsd.org Received: from mx1.FreeBSD.org (mx1.FreeBSD.org [216.136.204.125]) by hub.freebsd.org (Postfix) with ESMTP id 69D4C37B400 for ; Tue, 10 Sep 2002 08:37:42 -0700 (PDT) Received: from blueyonder.co.uk (pcow058o.blueyonder.co.uk [195.188.53.98]) by mx1.FreeBSD.org (Postfix) with ESMTP id 4C99C43E6A for ; Tue, 10 Sep 2002 08:37:41 -0700 (PDT) (envelope-from andrew@cream.org) Received: from pcow058m.blueyonder.co.uk ([127.0.0.1]) by blueyonder.co.uk with Microsoft SMTPSVC(5.5.1877.757.75); Tue, 10 Sep 2002 16:37:37 +0100 Received: from cream.org (unverified [62.31.80.97]) by pcow058m.blueyonder.co.uk (Content Technologies SMTPRS 4.2.9) with ESMTP id ; Tue, 10 Sep 2002 16:37:37 +0100 Message-ID: <3D7E1298.1050205@cream.org> Date: Tue, 10 Sep 2002 16:41:12 +0100 From: Andrew Boothman User-Agent: Mozilla/5.0 (Windows; U; Windows NT 5.0; en-US; rv:1.1) Gecko/20020826 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Andrew Boothman Cc: questions@freebsd.org Subject: Re: Problem with USB Webcam under OHCI? References: <3D7A9E77.9040104@cream.org> Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-freebsd-questions@FreeBSD.ORG Precedence: bulk List-ID: List-Archive: (Web Archive) List-Help: (List Instructions) List-Subscribe: List-Unsubscribe: X-Loop: FreeBSD.ORG Andrew Boothman wrote: > > But when I try to use vid to take an image I get : > > ohci_device_isoc_start: not implemented > > on the console. Worse, the vid process hangs and if I try to kill it > (but not before then) the whole machine hangs! > > I searched the archives and googled but I couldn't see anything > relevent. I do note that the controller that the cam worked on was > UHCI, but failed on an OHCI one. I've no idea if that's relevent though. I'm going to answer my own question, so that the answer is in the -questions archive should anyone else need it again. After reading the FreeBSD USB Page - http://www.etla.net/~n_hibma/usb/ - and reading the archives of the bsd-usb mailing archive contained on that site, it appears that isochronous transfers on OHCI controllers are only supported on -current at present not on -stable and hence not in any -releases. Isochronous transfers on UHCI controllers are supported on all versions of FreeBSD. It appears that we'll have to wait until there is an MFC of the relevent code before this will work on -stable. I hope this helps someone in the future. Andrew. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message