[Pkg-bluetooth-maintainers] Bug#776363: Keyboard/Mouse devices are disconnecting after some time or event (capslock, ) - unknown main item tag 0x0

[Michael Leuker]

The same happens on my system (Stretch) and it's not just the mouse and
keyboard but other devices, too. For example, I can never connect more
than one bluetooth gamepad at the same time - doing so simply
disconnects the previously attached one. Connecting only one pad always
disconnects the keyboard for a couple of seconds, too.

However, after trying different combinations I have found a workaround
that seems to isolate the mouse as the culprit, at least on my system:
When it is disconnected, neither the keyboard nor the gamepads (tested
up to four) exhibit the behavior described above. Connecting the mouse
after connecting the keyboard / pads doesn't disconnect them either.

I figured that, though it has worked on my previous and current laptop
until I installed an Intel 7260NGW M.2 card (in lieu of a BCM4352), it
might be the mouse, but replacing it with another model yielded the
exact same results. The behavior seems to be (in part at least)
dependent on the wireless / bluetooth NIC.

Any ideas where I might start to look to solve this? I can post any logs
/ details you might need, so please let me know what you need.