osk5912 webcam: surprising

osk5912 webcam: surprising

[karthik]

Hi
I had earlier mailed to this group about being not able to interface a webcam via the USB interface (power budget exceeded). recently i got hold of a hub with an external power adapter. 

Now here is the funny thing

I connect the camera straight to the kit, it does NOT work (it says powerbudget exceeded).

But if I connect it via the hub WITHOUT the hub's external power adapterm,  it works (it gets registered at minor 0). I am able to record videos.

i have another hub, but shows the same power budget problem with that.
Any explanation?? just curious (and frustrated).

karthik



       
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Re: osk5912 webcam: surprising

[George G. Davis]

On Fri, May 25, 2007 at 01:55:19AM -0700, karthik wrote:
> Hi
> I had earlier mailed to this group about being not able to interface a webcam via the USB interface (power budget exceeded). recently i got hold of a hub with an external power adapter. 
> 
> Now here is the funny thing
> 
> I connect the camera straight to the kit, it does NOT work (it says powerbudget exceeded).
> 
> But if I connect it via the hub WITHOUT the hub's external power adapterm,  it works (it gets registered at minor 0). I am able to record videos.
> 
> i have another hub, but shows the same power budget problem with that.
> Any explanation?? just curious (and frustrated).

Perhaps the working non-externally powered hub lied and said that it is
self powered, i.e. it does not comply with USB specs?

-- 
Regards,
George

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