Actually, I've found out that it disconnects with USB 1.1 too, just not that frequently. This is a common problem with the rt2570 as I've found on the rt2x00 forums.
http://rt2x00.serialmonkey.com/phpBB2/viewtopic.php?t=237 The solution is to use ndiswrapper and the latest Windows drivers for WLI-U2-KG54-AI. -- Buffalo WLI-U2-KG54 wireless USB adapter disconnects randomly when ehci_hcd (USB 2.0) support is on https://launchpad.net/bugs/81272 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs