From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932416AbVLENTI (ORCPT ); Mon, 5 Dec 2005 08:19:08 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S932413AbVLENTI (ORCPT ); Mon, 5 Dec 2005 08:19:08 -0500 Received: from xproxy.gmail.com ([66.249.82.197]:2438 "EHLO xproxy.gmail.com") by vger.kernel.org with ESMTP id S932416AbVLENTH convert rfc822-to-8bit (ORCPT ); Mon, 5 Dec 2005 08:19:07 -0500 DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com; h=received:message-id:date:from:reply-to:to:subject:mime-version:content-type:content-transfer-encoding:content-disposition; b=r+YHNXbYbpcTltbtkUBx++jDKlDHaGHiru1m4rOWdiYqxsEk/JD0EeVeyzsPdid++bUnMRv3s0wJWnO/y90Nm6bgb7ltriXKlI05Q7qNYHQrQo/ejoDTZwDR4ODmP6JYxX0o82HJ/2vqE3PiLU0prWSu2A/54y2BKP541Gas00Q= Message-ID: <4413284c0512050519n67c50a88t@mail.gmail.com> Date: Mon, 5 Dec 2005 11:19:05 -0200 From: =?ISO-8859-1?Q?Herv=E9_Fache?= Reply-To: herve@lucidia.net To: linux-kernel@vger.kernel.org Subject: Scanner/webcam not working when connected to USB hub MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Hello guys, I have the following problem: if connected directly to my computer's USB ports, my webcam works correctly, but when connected through my 'AirVast' hub (124a:168b), it fails. The device is reported by lsusb (IDs correct), but it does not work. The worst is: I have tried using some proprietary OS, and it all worked there. There are two possibilities (did I miss one?) I guess: either libusb is playing, or the kernel USB stack is. Now, rather than giving work to others, I don't mind trying to find the problem myself, but I would appreciate a pointer to how to debug such a problem... Tools? Compilation options? Cheers, Hervé. Kernel: 2.6.12 from Kubuntu Hub Descriptor: bLength 9 bDescriptorType 41 nNbrPorts 3 wHubCharacteristic 0x0002 No power switching (usb 1.0) Ganged overcurrent protection bPwrOn2PwrGood 1 * 2 milli seconds bHubContrCurrent 0 milli Ampere DeviceRemovable 0xf0 PortPwrCtrlMask 0x37 Hub Port Status: Port 1: 0000.0103 power enable connect Port 2: 0000.0100 power Port 3: 0000.0103 power enable connect