There are no udev events at all for the device, and dmesg does not have any trace of the device either, so this looks like a kernel regression.
** Changed in: hal (Ubuntu) Sourcepackagename: hal => linux-source-2.6.15 Status: Needs Info => Unconfirmed -- mp3 usb device not detected https://launchpad.net/bugs/44394 -- desktop-bugs mailing list desktop-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/desktop-bugs