Date: Tue, 10 Sep 2002 16:41:12 +0100 From: Andrew Boothman <andrew@cream.org> To: Andrew Boothman <andrew@cream.org> Cc: questions@freebsd.org Subject: Re: Problem with USB Webcam under OHCI? Message-ID: <3D7E1298.1050205@cream.org> References: <3D7A9E77.9040104@cream.org>
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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
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