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Keychron K5SE Bluetooth cannot reconnect after pairing

cn flag

Having issues with Keychron K5SEA3. Just bought the keyboard and decided to try it with Ubuntu 20(and 22.04 afterwards... hoping). Problem is - I pair it just fine and it works like a charm. But the moment I decide to disconnect (even changing the channel with Fn+1/2/3) it simply cannot reconnect.

In gnome's bluetooth manager I see the going to Connecting for a fraction of a second, after which it fails. I have tried a few articles which suggested that it needs to be added as Trust, but that doesn't seem to help.

I have other bluetooth peripherals (corsair mouse and sony headphones), which don't seem to have such a problem. Also in Windows the issue doesn't seem to happen.

Help!

sean avatar
st flag
The answer is probably something to do with power management. Essentially, the bluetooth device is exposed to the system on a usb host. Although this really isn't a solution here, I figured you should have a look at it as it is likely the problem. The mouse, headphones, and w/e can work and the keyboard still by itself can be handling the suspend events terribly. I have a keyboard that's fine with it, but my mouse never wakes up. The keyboard and touchpad on the laptop never have a problem.
Draaksward avatar
cn flag
@sean, I thought about this, but no - the keyboard can have 3 simultaneous bt connections (triggered by FN+1/2/3). I pair it on the first channel, do FN+2, then back to FN+1, and it cannot reconnect. Matter of seconds.
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