This looks familiar, a 1505 adapter freezing on the aha152x driver.
Patches have just come through that seem to fix that driver
but that is probably only for the 2.3 series kernels.
Rather than go forward you can pick up the aha152x driver as
it was in 2.2.5 and try that. It has solved some people's
problems. You can find that old driver on
http://www.torque.net/sg [follow faq link]
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