webcam & usb-hub

Hello

I have the Creative WebCam using the spca5xx driver from http://mxhaard.free.fr/index.html. Work nice the problem start if I connect the WebCam to the USB-Hub instead to connect the WebCam directly to the computer.
If I connect the WebCam to the 4-ports-Hub I get the next messages (using dmesg):
usb 1-2.3: new full speed USB device using ehci_hcd and address 33
usb 1-2.3: configuration #1 chosen from 1 choice
/mnt/data1/root/tmp.d/spca5xx-20060501/drivers/usb/spca5xx.c: USB SPCA5XX camera found. Type Creative Webcam Notebook Zc301+Tas5130c
/mnt/data1/root/tmp.d/spca5xx-20060501/drivers/usb/spca5xx.c: [spca5xx_probe:5480] Camera type JPEG
/mnt/data1/root/tmp.d/spca5xx-20060501/drivers/usb/zc3xx.h: [zc3xx_config:487] Find Sensor UNKNOW_0 force Tas5130
/mnt/data1/root/tmp.d/spca5xx-20060501/drivers/usb/spca5xx.c: [spca5xx_getcapability:1765] maxw 640 maxh 480 minw 176 minh 144

In the other way if I connect the WebCam directly to the computer the first two lines are the only difference, see next:
usb 2-1: new full speed USB device using uhci_hcd and address 15
usb 2-1: configuration #1 chosen from 1 choice

Using the 4-port-Hub the mplayer fail open the video device, geting the next message:
unable to open '/dev/video0': Function not implemented

So, that is a problem in a spca5xx driver or in the kernel or where ???


Thank you very much,
Gustavo

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