Comment 8 for bug 658471

Odd behavior is still present in Natty. I use the Logitech MX-5500 Revolution combo, and the bluetooth dongle does not show up as a Bluetooth device by default in Natty at all, though the keyboard/mouse do work by default in Logitech's "fallback" mode which connects the devices as pseudo-wired when the dongle is hotplugged.

The problem is that in fallback mode, I have been getting random disconnections with the standard Natty configuration, which still splits kernel conditions into hiddev and hidraw. The device does not stay connected for more than two hours or so, and I need to re-hotplug it.

By commenting out the leading kernel conditions entirely and leaving the two declarations starting with ATTRS, as suggested here and in the original bug report #444420, it is now being detected as a Bluetooth dongle and allows me to do a proper pairing with the devices from within Ubuntu. So far this has been MUCH more stable and gives me greater range as well.

Is the issue just that the default behavior desired by the devs was "just works" plug and play? Relying on Logitech's fallback functionality for standard keyboard/mouse connection is less than desirable for real daily use. Maybe a device-specific recommendation through the Additional Drivers detection process, along with an installable package to switch the default configuration for the dongle device to native Bluetooth functionality, would be a better way to approach it to "solve" the issue for everyone. It could even include a description of the pairing process for the two devices as part of the package install.