Re: gspca zc3xx spc210nc zoom problem

Hi All

Just to follow up:

> Hi
>
> webcam: philips spc210nc
> kernel: stable 2.6.30 from kernel.org
>
> Picture is generally fine but after 10 or 15 min the picture scales (zoom=
s) a 1/4 th part of the image to occupy the complete window.
> This happens with skype. I have just put a pictoral explanation here for =
clarity (see url: below)
>

There was this posting in skype forums: (a patch was included)
http://forum.skype.com/index.php?showtopic=3D127561&view=3Dfindpost&p=3D574=
031
See below for a summary. http://forum.skype.com/index.php?showtopic=3D12756=
1&view=3Dfindpost&p=3D715021

Can any spca devel confirm if this is upstream (merged) ?

Many thanks,
Karthik


> SUMMARY
> =

> I'm using Skype quite often, and used to use my webcam too. Under
> Ubuntu 7.10, there were no problems in using it: Skype + cam worked
> amazingly. Since I've upgraded to Ubuntu 8.04, when I'm starting my
> cam under Skype, it seems to work correctly, but a few seconds later,
> my video resolution changes and I can see/send only half the video.
> (It's like a zoom on the upper left corner.) And the most
> extraordinary about it: In the video-section of the options,
> everything's fine, the video doesn't resize, doesn't bug at all.
> (I've tested it during about half an hour.) I don't know if it's due
> to Skype and an incompability to Ubuntu 8.04 or if it's due to Ubuntu
> 8.04 itself. Does anyone have the same problem? Does anyone know how
> to solve it?


> OK, I think I've got it solved. In a nutshell: the patch that can be =

> found from the ekiga forum works in general, however, it doesn't do =

> so out of the box, because ubuntu doesn't place the gspca driver in =

> the default directory, and so it doesn't get removed when the patched
>  version installs.
> =

> Do the following: 1. download the GSPCA driver source:
> =

> =

> 2. unpack the source: tar xzf gspcav1-20071224.tar.gz wget =

> http://mxhaard.free.fr/spca50x/Download/gspcav1-20071224.tar.gz
> =

> 3. download the patch: wget =

> http://saillard.org/ekiga/gspcav1-20070508_force_using_hardware_mode_v3.p=
atch
> =

> =

> =

> 4. apply the patch: cd gspcav1-20071224 patch -p1 < =

> ../gspcav1-20070508_force_using_hardware_mode_v3.patch
> =

> 5. remove the ubuntu gspca driver(!): sudo rm -f /lib/modules/`uname =

> -r`/ubuntu/media/gspcav1/gspca.ko
> =

> 6. build and install the gspca driver: sudo ./gspca_build
> =

> If you want to make double sure, use locate gspca | grep =

> ^/lib/modules/`uname -r` in step 5 to verify that there are no =

> gspca.ko drivers sitting around elsewhere. If there they do, remove =

> them before proceeding to step 6.
> =

> You will probably have to re-apply this procedure after every =

> kernel-upgrade. So just keep the source around and repeat steps 5 and
>  6 after a kernel-upgrade.
> =

> I hope this works for everyone. Please let me know if it doesn't -- =

> just out of personal interest, I'm not affiliated with Skype or =

> anything.
> =

> cheers, Christian



> Any suggestions to fix this issue. If I stop video in skype and restart i=
t then the problem is fixed for another 10 minutes.
>
> lsusb -v (is below)
>
> Bus 007 Device 002: ID 0471:032d Philips
> Device Descriptor:
> bLength 18
> bDescriptorType 1
> bcdUSB 1.10
> bDeviceClass 255 Vendor Specific Class
> bDeviceSubClass 0
> bDeviceProtocol 0
> bMaxPacketSize0 8
> idVendor 0x0471 Philips
> idProduct 0x032d
> bcdDevice 1.00
> iManufacturer 1 Philips
> iProduct 2 SPC210NC
> iSerial 0
> bNumConfigurations 1
> Configuration Descriptor:
> bLength 9
> bDescriptorType 2
> wTotalLength 193
> bNumInterfaces 1
> bConfigurationValue 1
> iConfiguration 0
> bmAttributes 0x80
> (Bus Powered)
> MaxPower 100mA
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 0
> bAlternateSetting 0
> bNumEndpoints 2
> bInterfaceClass 255 Vendor Specific Class
> bInterfaceSubClass 255 Vendor Specific Subclass
> bInterfaceProtocol 255 Vendor Specific Protocol
> iInterface 0
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x81 EP 1 IN
> bmAttributes 1
> Transfer Type Isochronous
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0000 1x 0 bytes
> bInterval 1
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x82 EP 2 IN
> bmAttributes 3
> Transfer Type Interrupt
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0008 1x 8 bytes
> bInterval 10
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 0
> bAlternateSetting 1
> bNumEndpoints 2
> bInterfaceClass 255 Vendor Specific Class
> bInterfaceSubClass 255 Vendor Specific Subclass
> bInterfaceProtocol 255 Vendor Specific Protocol
> iInterface 0
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x81 EP 1 IN
> bmAttributes 1
> Transfer Type Isochronous
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0080 1x 128 bytes
> bInterval 1
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x82 EP 2 IN
> bmAttributes 3
> Transfer Type Interrupt
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0008 1x 8 bytes
> bInterval 10
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 0
> bAlternateSetting 2
> bNumEndpoints 2
> bInterfaceClass 255 Vendor Specific Class
> bInterfaceSubClass 255 Vendor Specific Subclass
> bInterfaceProtocol 255 Vendor Specific Protocol
> iInterface 0
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x81 EP 1 IN
> bmAttributes 1
> Transfer Type Isochronous
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x00c0 1x 192 bytes
> bInterval 1
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x82 EP 2 IN
> bmAttributes 3
> Transfer Type Interrupt
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0008 1x 8 bytes
> bInterval 10
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 0
> bAlternateSetting 3
> bNumEndpoints 2
> bInterfaceClass 255 Vendor Specific Class
> bInterfaceSubClass 255 Vendor Specific Subclass
> bInterfaceProtocol 255 Vendor Specific Protocol
> iInterface 0
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x81 EP 1 IN
> bmAttributes 1
> Transfer Type Isochronous
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0100 1x 256 bytes
> bInterval 1
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x82 EP 2 IN
> bmAttributes 3
> Transfer Type Interrupt
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0008 1x 8 bytes
> bInterval 10
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 0
> bAlternateSetting 4
> bNumEndpoints 2
> bInterfaceClass 255 Vendor Specific Class
> bInterfaceSubClass 255 Vendor Specific Subclass
> bInterfaceProtocol 255 Vendor Specific Protocol
> iInterface 0
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x81 EP 1 IN
> bmAttributes 1
> Transfer Type Isochronous
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0180 1x 384 bytes
> bInterval 1
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x82 EP 2 IN
> bmAttributes 3
> Transfer Type Interrupt
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0008 1x 8 bytes
> bInterval 10
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 0
> bAlternateSetting 5
> bNumEndpoints 2
> bInterfaceClass 255 Vendor Specific Class
> bInterfaceSubClass 255 Vendor Specific Subclass
> bInterfaceProtocol 255 Vendor Specific Protocol
> iInterface 0
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x81 EP 1 IN
> bmAttributes 1
> Transfer Type Isochronous
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0200 1x 512 bytes
> bInterval 1
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x82 EP 2 IN
> bmAttributes 3
> Transfer Type Interrupt
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0008 1x 8 bytes
> bInterval 10
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 0
> bAlternateSetting 6
> bNumEndpoints 2
> bInterfaceClass 255 Vendor Specific Class
> bInterfaceSubClass 255 Vendor Specific Subclass
> bInterfaceProtocol 255 Vendor Specific Protocol
> iInterface 0
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x81 EP 1 IN
> bmAttributes 1
> Transfer Type Isochronous
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0300 1x 768 bytes
> bInterval 1
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x82 EP 2 IN
> bmAttributes 3
> Transfer Type Interrupt
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0008 1x 8 bytes
> bInterval 10
> Interface Descriptor:
> bLength 9
> bDescriptorType 4
> bInterfaceNumber 0
> bAlternateSetting 7
> bNumEndpoints 2
> bInterfaceClass 255 Vendor Specific Class
> bInterfaceSubClass 255 Vendor Specific Subclass
> bInterfaceProtocol 255 Vendor Specific Protocol
> iInterface 0
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x81 EP 1 IN
> bmAttributes 1
> Transfer Type Isochronous
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0380 1x 896 bytes
> bInterval 1
> Endpoint Descriptor:
> bLength 7
> bDescriptorType 5
> bEndpointAddress 0x82 EP 2 IN
> bmAttributes 3
> Transfer Type Interrupt
> Synch Type None
> Usage Type Data
> wMaxPacketSize 0x0008 1x 8 bytes
> bInterval 10
> Device Status: 0x0000
> (Bus Powered)
>
>
>
> Many thanks for your help,
> Karthik
>
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