> ------------------------------
>
> Message: 3
> Date: Wed, 7 Jan 2009 14:41:45 +0100
> From: Laurent Pinchart <laurent.pinch...@skynet.be>
> Subject: Re: [Linux-uvc-devel] Philips SPC620 stopped
> working after
> kernel update
> To: linux-uvc-devel@lists.berlios.de, tho...@feilnet.eu
> Message-ID:
> <200901071441.45587.laurent.pinch...@skynet.be>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hi Thomas,
>
> On Tuesday 06 January 2009, Thomas Feil wrote:
> > Hi Laurent,
> >
> > many thanks for replying to my messsage and thanks,too
> for
> > the effort you are spending providing these drivers!
> >
> > Following your advice, I checked for both
> installations:
> >
> >
> > @opensuse 11.1:
> > <6>usb 4-1: new full speed USB device using
> ohci_hcd and address 2
> > <6>usb 4-1: configuration #1 chosen from 1
> choice
> > <6>usb 4-1: New USB device found, idVendor=0471,
> idProduct=0333
> > <6>usb 4-1: New USB device strings: Mfr=0,
> Product=1, SerialNumber=0
> > <6>usb 4-1: Product: USB Video Camera
> >
> > lsmod | grep -i hci_hcd:
> > ohci_hcd 36548 0
> > ehci_hcd 55348 0
> > usbcore 198656 8
> >
> snd_usb_audio,usbhid,snd_usb_lib,uvcvideo,usb_storage,ohci_hcd,ehci_hcd
> >
> >
> >
> > @opensuse 11.0:
> > ===============
> > <6>usb 2-3: new high speed USB device using
> ehci_hcd and address 2
> > <6>usb 2-3: configuration #1 chosen from 1
> choice
> > <6>usb 2-3: New USB device found, idVendor=0471,
> idProduct=0333
> > <6>usb 2-3: New USB device strings: Mfr=0,
> Product=1, SerialNumber=0
> > <6>usb 2-3: Product: USB Video Camera
> >
> > lsmod | grep -i hci_hcd:
> > ehci_hcd 56204 0
> > ohci_hcd 42628 0
> > usbcore 188376 8
> >
> snd_usb_audio,usbhid,snd_usb_lib,uvcvideo,usb_storage,ehci_hcd,ohci_hcd
> >
> >
> > It looks like, that in 11.1 ohci_hcd is loaded first
> and ehci_hcd
> > second. Then the device gets initialized with the
> ohci_hcd and
> > the uvc driver believes it's got a slow usb
> camera.
>
> It's not the UVC driver that believes that, but the
> Linux USB stack.
>
By the way the usb kernel team explicitely says the ehci_hcd should be loaded
first.
This is written also in the docs. May be find out why your distro is doing
something that is not correct
regards
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