I have a Gumstix Summit and an Overo Tide which I have configured as an
USB mass storage device (using the Linux file storage gadget driver).
It is working fine and is detected correctly by a host computer when I
plug it in.
When I move the Overo card to a Thumbo expansion board and plug it in to
a host computer, I would expect it to work the same. However, nothing
happens. Not even a single message in the host computer dmesg output.
Is there some difference between the OTG USB port on Summit and Thumbo
that I do not know about?