Other bug reports related to this issue claim that the problem is only with unpowered usb hubs. I've plugged my Linksys WUSB54GS into my computer and the kernel still deactivates it. Other people have run into the same problem as noted in the thread I linked to in my previous post.
-- user is not informed if there is not enough power for usb devices https://launchpad.net/bugs/67848 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs