On Wednesday, 4. July 2001 22:07, you wrote:
> > >I have tried to run a webcam (ov511 based) on my old Cyrix 486 100 Mhz
> > >using an Opti OHCI card.
>
> Seems like Cyrix and PCI have ongoing problems, in all incarnations, which
> seem to show up a lot with OHCI addon cards. If you use an Intel 486,
> does this same problem show up? Some Cyrix-related problems have been
I'll try this, if I can get one.
> been known to vanish with just a CPU swap. (I know that may not be an
> answer you want, or can easily test.)
If you're right, that would be terrible, because a lot of embedded 486 based
PC on chip have a Cyrix 486 core inside.
> > I have done some tests with vidcat and discovered another problem:
> > If you try to read frames from an usb webcam on a 486 based board, it
>> will
> > block after a several frames.
> > After a few frames, the camera device driver doesn't receive any
>> interrupts,
> > so the interrupt handler of the camera device driver (f.e. ov511) isn't
> > executed any more.
>
> Which means that the OHCI controller is probably not getting interrupts
> to pass on to the camera driver, or if it's getting interrupts then the
> Cyrix
> PCI issues may be rearing their ugly heads.
>
> - Dave
you assume that's PCI-related hardware-problem, isn't it ? If I have
got your point, the OHCI stops generating interrupts and therefore
it's not dependant on the usb stack. Isn't it possible to reset the OHCI ?
Franz
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