Re: uvcvideo module compatibility

brownh wrote:

Chris Davies <chris-usenet@xxxxxxxxxxxx> writes:

Is it possible that you have not removed the old modules from
/lib/modules? Try this as root:

for F in `find /lib/modules/`uname -r` -name 'uvcvideo*'`
do mv "$F" "$F".`date +'%Y-%m-%d'`; done

I had trouble with this command (syntax error near "done"), although if
I knew how to copy/paste the string in your message from emacs/gnus to
an xterm without a mouse, I might have done better. In any case there is
a .../uvc/uvcvideo.ko, which I suppose I could just delete. That you
didn't simply tell me to do that is the reason I hesitate to do it now.

I don't think you have told us the actual version of the QuickCam Pro
you're trying to use?

I didn't realize there were different versions of the Logitech QuickCam
Pro for Notebooks. There's no version number on the device. Neither
lsusb or dmesg after a reconnect conveys that information.

You may find that some manufacturers change critical chipsets for devices
without changing the model or revision of a product. I am aware of this
happening with wireless cards, and webcams. I have learned that sometimes
the USB ID is more important than the manufacturer and model of the product.

Also, is there any chance you can upgrade to (at
least) 2.6.28? I found a significant improvement in the V4L layers here.

I presume the reason is that the driver is built into that kernel and so
the webcam becomes plug-and-play. Is this right?

That somewhat depends on what you mean by "plug-and-play." I have been
impressed by the Linux webcam support (I use a UVC webcam), but many
programs don't support V4L2, and sometimes a device driver only supports V4L
(revision 1). Some programs work better than others with particular
webcams, because webcam formats can vary. Some webcam drivers don't support
read(), so only the programs that use mmap() work with those drivers.

I found that Skype worked best with my webcam, and the uvc driver, other
programs crashed, or displayed images I didn't expect. Your experience will
probably vary.

-George

.

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