Re: webcam & usb-hub
Le Samedi 4 Novembre 2006 22:30, gustavo halperin a écrit :
> 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
Gustavo,
A old problem with usb bandwith was fixed with gspcav1. Now the driver will
negociate the bandwith by slow down the alternate setting until no bandwith
is available. This feature allow to have a slow device set with a webcam
(hight speed device) without problem, ofcourse you need to register first
the slow device then the hight speed :) In case nobandwith is available the
driver return ENOSPC error (-28)
regards
--
Michel Xhaard
http://mxhaard.free.fr
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