Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S262521AbUKLKpp (ORCPT ); Fri, 12 Nov 2004 05:45:45 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S262514AbUKLKpm (ORCPT ); Fri, 12 Nov 2004 05:45:42 -0500 Received: from main.gmane.org ([80.91.229.2]:23958 "EHLO main.gmane.org") by vger.kernel.org with ESMTP id S262522AbUKLKo0 (ORCPT ); Fri, 12 Nov 2004 05:44:26 -0500 X-Injected-Via-Gmane: http://gmane.org/ To: linux-kernel@vger.kernel.org From: Juergen Stuber Subject: Re: USB-1.1 fails with USB 2.0 Hub Date: Fri, 12 Nov 2004 11:44:19 +0100 Message-ID: <86d5yjtkho.fsf@jstuber.net> References: <6.1.1.1.0.20041108074026.01dead50@ptg1.spd.analog.com> <200411112003.43598.Gregor.Jasny@epost.de> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: 8bit X-Complaints-To: usenet@sea.gmane.org X-Gmane-NNTP-Posting-Host: dsl-082-083-092-212.arcor-ip.net User-Agent: Gnus/5.1006 (Gnus v5.10.6) Emacs/21.3 (gnu/linux) Cancel-Lock: sha1:4Yprz6xziizFZmPPPAP3UV6k49Q= Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1546 Lines: 39 Hi Gregor, Gregor Jasny writes: > > Just a simple me, too. I don't think it is the same problem. > I've got the problem with a TerraCAM USB Pro. Plugged > into my Apple Keyboard it works (with a warning about high power > consumption). But if I plug it into my Belkin F5U237 the driver complains > with: "drivers/usb/media/ov511.c: init isoc: usb_submit_urb(0) ret -38". -38 is -ENOSYS which means "Function not implemented" (see include/asm-generic/errno.h in the kernel sources). To support USB 1.1 devices over a 2.0 hub the hub contains a so-called transaction translator that needs special support in the USB driver, and which works differently for isochronous transfers (note the isoc in the error message). This is usually implemented after the other transfer types. > Have you already tried another USBv2 hub? I don't think you can cure it with a different 2.0 hub. You can either use only 1.1 hubs on the path to the device, like with the keyboard, or try a newer kernel version (but then 2.6.9 is already rather new). Hope this helps J?rgen -- J?rgen Stuber http://www.jstuber.net/ gnupg key fingerprint = 2767 CA3C 5680 58BA 9A91 23D9 BED6 9A7A AF9E 68B4 Looking for consulting and project work in Mozart/Oz, Linux kernel, USB - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/