I can confirm this, its a missing feature in Xorg. Maybe Xorg 7.2 can handle Hotplug input Devices. the old way over /dev/input/mice is a "workaround" because the Kernel handle the hotplugging and map all mice on this device. For the event devices there is no such generic device. So the device file exists only when the device is present.
I've the same Problem with my Bluetooth Mouse, because of the limitations of the old way I can't use all Buttons :-/ -- evdev is not working when you hotplug devices https://launchpad.net/bugs/26825 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
