On Tuesday 23 December 2008, nivelin@xxxxxxxxxx wrote: > I am developing an embedded device to work with Linux host via two CDC comm > ports - an USB composite device. As someone pointed out: use cdc-acm and it should "just work" with no problems. (Though as always, current code may have bugfixes that older code won't.) I've certainly configured CONFIG_USB_G_SERIAL to run as a composite device with two CDC ACM interfaces, and they all came up and worked just fine. Ditto when I configured four ACM interfaces (and more!), but I didn't have patience to test all of them with concurrent I/O. ;) - Dave -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html