I have an unreleased device that I am attempting to get working under
linux. It works fine under win98. Also I am having the same problem with
an Intel USB camera. I know that there are no drivers for these, but as
you can see that isn't the problem here. I did manage to get a USB
keyboard to connect correctly.
Fortunately I have a CATC USB Chief analyzer, although I have to note that
I am somewhat new to USB.
The problem occurs during the GET_DESCRIPTOR transaction. (The second one
with the proper address add=2) The transaction is not acked. It is sent
in five groups of three, none of them acked or nacked. There is no
repsonse from the device at all.
I suspect the problem actually occurs earlier during the set_address. The
set_address is sent (the same as the win98) and acked, then several INs
are sent each of which are nacked until a final one is acked. On win98
the first one is acked.
A similar result follows the first (address=0) get_descriptor. Again no
nacks on win98.
Another difference is that there appear to be several RESETs under win98.
Of note is one that falls between the get_descriptor (add=0) and the
set_address.
Any advice? I may be able to provide traces. I would say the device is
bad, but things are smooth as silk under win98. Possibly it is just out
of spec? It seems to follow a VERY similar sequence under win98, but
somehow it enumerates correctly.
I am using 2.2.15 with the backport under uhci.o Thanks for any advice
you can offer.
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Mark Douglas Corner
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