Thanks to all involved for the great progress. This is obviously very close to working now. I have not had time to investigate, but I thought I would report a couple of observations. After building and installing a set of kernel packages from the kernel-hostmode source with some additional USB serial modules enabled, I was able to get three different RS232 adapters to work for a brief time with no external hub or power. With both my kernel, and the original kernel-hostmode kernel, I noticed the loss of power after a few seconds which obviously causes the kernel to report many problems when trying to use the device.

I also noticed that both my build of the kernel and the distributed hostmode kernel don't shut down cleanly, rebooting rather than powering down when attempting to power the phone off. I assume the kernel crashes on it's way down and the watchdog reboots it.

But this progress is very promising! I'm sure these issues will be quickly resolved.

Thanks!

--Brad