Have a Microsoft Mobile Keyboard 6000 (new, slim one with separate number pad). Works perfectly with Windows (tried it out at work), but have a major issue with Ubuntu (both 9.10 and 10.04, latter running bluez 4.60-0ubuntu8):
If the keyboard enters sleep mode, when re-awakened, it has a tendency to kind of get stuck: it starts repeating the latest key pressed and won't respond to new keypresses. To stop the repetition requires pressing something on a USB keyboard or some other intervention (via a mouse, for example). After this "stuck key" the keyboard usually becomes unresponsive except for periodically repeating the behaviour.
To get the keyboard working again, requires deleting the old connection in Bluetooth manager and setting up a new connection. This new connection will work until the keyboard goes to sleep again and wakes up, after which we're back in square one.
I don't really know anything about tracking down the problem. Will offer more information if you'll point me at the right direction.
Hi! Sorry for not posting on this one before... Here is my dmesg -file right after a freakout.