[AG-DEV] Vic Video Device Conflicts

[Douglas Kosovic]

Hi Todd,

Try updating to kernel-2.6.25.11 which has a USB related fix, it'll
hopefully solve the PWC webcam's device busy issue.

I'm not able to reproduce the problem with Fedora 9 (updated to the
latest kernel) running both the bttv and pwc drivers.


Cheers,
Doug

> -----Original Message-----
> From: Douglas Kosovic
> Sent: Thursday, 24 July 2008 7:59 AM
> To: Todd Zimmerman
> Cc: ag-dev
> Subject: Re: [AG-DEV] Vic Video Device Conflicts
> 
> Hi Todd,
> 
> >> Thanks for the screenshot attachment, it made it clear.
> >>
> >> Looks like one of the VICs fails during the webcam driver
> >> detection/interrogation for some reason, in which case VIC will
> >> default to the device at the top of the device list.
> >>
> >> VIC only creates the device list with the device names, anywhere
> >> else  that the device name appears in VIC is a string passed
> >> from the AGTk.
> >> Any issues with the other VIC are most likely side-effects due to
> >> the webcam VIC.
> >
> > Ah.. understood.
> >
> >
> >> With the recent VIC RPMs they now output the V4L & V4L2 debugging
> >> output, could you send that?
> >
> > I've attached the venueclient debug (that seems to have the vic
debug
> > also) if that is what you mean.  If you want any other debug files,
> > send me a note.
> >
> > This log shows VC launch, configuration selected, venue entered with
> > resulting failed video - then vc kill.
> 
> The PWC webcam driver (which is what the Logitech QuickCam Pro 4000
> uses) is busy, extract from log :
>    V4L2: trying /dev/video0... Error opening: /dev/video0 :
>    Device or resource busy
> 
> With the majority of V4L2 drivers this situation doesn't happen as
they
> are happy with two applications accessing the device at the same time
> to interrogate them. Anyway, I've got to think about it.
> 
> The other issue I notice is that your bttv driver is capturing at
> 704x480, I think I'm going to apply Claus's patch exactly like his
> original and not my variation, so that it will force it to use
640x480.
> 
> 
> Cheers,
> Doug