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#1 2009-12-30 13:17:45

PascalDragon
Member
Registered: 2008-12-23
Posts: 4

Quickcam Web not working

Hello together!

Since qc-usb was replaced with gspca I have troubles with my Webcam. It's a Quickcam Web (more precisely: LEGO cam) 046d:0850 and it used to work with qc-usb. It's also listed as a supported one in the gspca files.

It is correctly recognized when plugged in:

usb 2-1: new full speed USB device using ohci_hcd and address 3
usb 2-1: configuration #1 chosen from 1 choice
Linux video capture interface: v2.00
gspca: main v2.7.0 registered
STV06xx: Probing for a stv06xx device
gspca: probing 046d:0850
STV06xx: Configuring camera
STV06xx: vv6410 sensor detected
STV06xx: Initializing camera
gspca: probe ok
STV06xx: Probing for a stv06xx device
gspca: probing 046d:0850
STV06xx: Probing for a stv06xx device
gspca: probing 046d:0850
usbcore: registered new interface driver STV06xx
STV06xx: registered
usbcore: registered new interface driver snd-usb-audio

When I try to cat from the video device I get this:

cat: /dev/video: Input/output error

dmesg now reports:

gspca: usb_submit_urb alt 1 err -28
gspca: no transfer endpoint found

Other applications (mplayer, amsn, etc.) behave similar.

My first tests on a 2.6.29 kernel months ago resulted in a Kernel Panic, with 2.6.32 it's not working "only"...

Regards,
Sven

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#2 2009-12-31 14:01:25

ErikAndren
Member
Registered: 2009-12-31
Posts: 1

Re: Quickcam Web not working

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#3 2009-12-31 17:07:52

PascalDragon
Member
Registered: 2008-12-23
Posts: 4

Re: Quickcam Web not working

Thank you very much. Your link (and another google search which taught me about guvcview) helped me.

After I unplugged my USB keyboard and mouse (two different devices) from my computer (no hub!) the cam started to work (note: I'm using a laptop). I'm very surprised by this behavior.

Now I need to find a solution for this bandwidth problem, because without full keyboard and mouse chatting is not very comfortable (and that's the sole purpose of this cam)

EDIT: Well... unplugging one of the two devices (keyboard, mouse) seems to be sufficient... perhaps I should learn to live without a real mouse smile (that's easier than without a real keyboard)

Regards,
Sven

Last edited by PascalDragon (2009-12-31 17:18:02)

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#4 2010-01-04 12:18:53

PascalDragon
Member
Registered: 2008-12-23
Posts: 4

Re: Quickcam Web not working

Ok... I now found a working solution (with the help of usbview).

My laptop has three USB ports. One on the rear and two on the left. The rear one and one of the left ones are connected to the same controller and the other one on the left side has its own controller. When I plug the camera into the single port and keyboard and mouse into the other two, I can use the cam without problems. If the camera needs to share the controller with another device, it won't work. Stupid USB controllers -.-

Regards,
Sven

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