Messages in this thread | | | Date | Mon, 5 Dec 2005 11:19:05 -0200 | From | Hervé Fache <> | Subject | Scanner/webcam not working when connected to USB hub |
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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 - 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/
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