Re: video: USB webcam fails since kernel 3.2

[Hans de Goede <hdegoede@redhat.com>]

Hi,

On 07/08/2012 08:33 PM, Jean-Francois Moine wrote:
> On Sun, 08 Jul 2012 19:58:08 +0200
> Hans de Goede <hdegoede@redhat.com> wrote:
>
>> Hmm, this is then likely caused by the new isoc bandwidth negotiation code
>> in 3.2, unfortunately the vc032x driver is one of the few gspca drivers
>> for which I don't have a cam to test with. Can you try to build your own
>> kernel from source?
>
> Hi Martin-Éric,
>
> Instead of re-building the gspca driver from a kernel source, you may
> try the gspca test tarball from my web site
> 	http://moinejf.free.fr/gspca-2.15.18.tar.gz

That is a good option too and easier then building a whole new kernel,
but:

> It contains most of the bug fixes, including the one about the
> bandwidth problem.

Right, but the problem with the vc032x driver is that there no bandwidth
related bugfix for it yet, which is why I asked Martin-Éric, not only
to build a new gspca driver from source, but also to try some modifications.

Martin-Éric,

Building the gspca test-tarbal also is a good way to test this:
http://moinejf.free.fr/gspca-2.15.18.tar.gz

But once you've confirmed the problem still happens with that version
you will still need to try the changes I suggested to gspca.c to help
us confirm that this is a bandwidth issue and try to come up with a fix.

Thanks & Regards,

Hans