Greg, > I'd go buy a few different types, of different cores, and try to find > one that works for your workload. That's going to be the simplest, and > probably cheapest, way to do this. Thanks a lot for your help. I have to pick my poison. The ARM SoC box I'm using has a UART, but their RTS/CTS is broken (as in, stty crtscts rejected; they fixed that, but I still get no data). I can work on that driver or board configuration, and have a fix for a single platform. Or, I can find a working or fix (questionable) a broken USB serial driver and have a solution good for multiple platforms. I'd really like to give back and fix both. Unfortunately, I don't have enough lifetimes. As challenging and interesting as that may be, I have an actual job I have to do. And my boss likes it better when I spend time on that. :) I'll collect more data using adapters with different chips as well as a more recent kernel. Then I can provide more useful information to the linux-usb@xxxxxxxxxxxxxxx email list. Larry Baker US Geological Survey 650-329-5608 baker@xxxxxxxx -- To unsubscribe from this list: send the line "unsubscribe linux-serial" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html