USB webcam not attaching: proposed patch

[Hans Petter Selasky]

On 2020-05-21 12:49, José Pérez via freebsd-multimedia wrote:
> Hi,
> I am trying to have a Logitech webcam work with FreeBSD,
> while audio works ok (has an integrated mic that gets
> identified as uaudio), video does not because it requires
> manual start of webcamd.
> 
> I find this annoying (I mean, I know you can add an rc.conf
> entry with webcamd_0_flags, but this is not idiot proof),
> and looked for a way to make it start automatically.
> 
> usbconfig reports:
> ...
> bInterfaceClass = 0x000a  <CDC-data>
> ...
> 
> So I updated webcamd.conf to identify this kind of
> interfaces, as follows:
> ---------------------------  CUT  ---------------------------
> --- webcamd.conf        2020-05-21 12:42:09.519165000 +0200
> +++ webcamd.conf.orig   2020-05-21 12:41:25.844895000 +0200
> @@ -7,15 +7,6 @@
>          action "/usr/local/etc/rc.d/webcamd start $cdev";
>   };
> 
> -# Vendor specific USB webcams.
> -notify 100 {
> -       match "system"          "USB";
> -       match "subsystem"       "INTERFACE";
> -       match "type"            "ATTACH";
> -       match "intclass"        "0x0a";
> -       action "/usr/local/etc/rc.d/webcamd start $cdev";
> -};
> -
>   # Vendor specific USB webcams and DVB devices.
>   notify 100 {
>          match "system"          "USB";
> ---------------------------  CUT  ---------------------------
> 
> This works for me, does anybody knows whether the interface
> class 0x0a is used in others webcams? Can this patch be pushed up?
> 

Hi,

The match rule must be narrowed down a bit.

Can you dump the full configuration and device descriptor for this 
device? 0x0a is not correct interface class. This will make trouble for 
USB ethernet devices.

--HPS