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7020100
(Get the code!)
Hi,
Thanks for pointing that out; I'd already seen this, but not had time to run the upgrade until today.
Unfortunately, the new bluetooth feature is at the UI level, not the driver, so the problem is still apparent. I must say that the new lxpanel plugin is much easier to use than the ones that I tried (Gnome, etc), but does not (and cannot I suspect) fix my problem.
I don't have access to any other modern keyboards or mice (eg those that support Bluetooth V 4.0, including low power mode), so I cannot confirm that this problem isn't just confined to Tecknet devices.
What I do know is that the mouse goes to sleep after a few seconds and even when I click the button to wake it up, it takes several seconds to reconnect. I suspect that the keyboard is behaving in a similar manner, so it is also lost if I don't keep typing. Put the two together and you are probably on a hiding to nothing.
I have also been able to try something else since my last post. I received delivery of a brand-new Dell XPS-13 Developer Edition recently and today I tried to pair these two devices to it. What I found was that the Bluetooth GUI on Ubuntu never asked me to enter a code on the keyboard, so I wasn't able to pair it. The mouse behaved in exactly the same way as it does on the Pi. This reinforces my belief that the problem is much deeper than the Pi and actually is at the bluez / kernel level.
I'll see if I can post this report on the bluez or main Ubuntu pages.