Re: Problem with BF531 and ISP1362 (linux 2.6.19.3)

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On Tue, 9 Oct 2007, Patrik Johansson wrote:

> Hi,
> 
> I have a board with a BF531 and a ISP1362. I'm getting timouts when
> doing device enumeration on certail devices. Most devices work fine, but
> I have a couple who times out when asking for string descriptors, and
> now one device that times out on SET_ADDRESS. I was able to get the
> devices that times out on string descriptors to work by disabling some
> code in drivers/usb/core/hub.c
> 
> I welcome any ideas and pointers towards fixing this issue. What
> information can I provide to help solve this? 
> 
> Btw, the device works perfectly on my desktop computer.
> 
> One weird "coincidence" is that all the devices where asking for string
> descriptors results in timeouts are devices using the MTP protocol (some
> of the support normal USB-storage as well).  The device that times out
> on SET_ADDRESS is a Muvid MP-521.

If you can build kernels with CONFIG_USB_DEBUG set on both the board
and the desktop computer, then there might be some useful information
in the dmesg logs of the two machines.  It would at least be 
interesting to compare them.

Alan Stern


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