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Bluetooth Disconnects, then Fails to Reconnect

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Sorry for my late reply, but I was busy over the last days. It looks like the keyboard problem is well known. I found this in the askubuntu forum.


dmesg | grep -i blue

[79901.864404] input: bluetooth mouse4.0 Mouse as /devices/pci0000:00/0000:00:13.1/usb6/6-2/6-2:1.0/bluetooth/hci0/hci0:13/0005:0A5C:0001.0009/input/input28
[79901.866919] hid-generic 0005:0A5C:0001.0009: input,hidraw2: BLUETOOTH HID v1.29 Mouse [bluetooth mouse4.0] on 5c:f3:70:a8:03:f6
[79938.987168] input: Keyboard K380 Keyboard as /devices/pci0000:00/0000:00:13.1/usb6/6-2/6-2:1.0/bluetooth/hci0/hci0:11/0005:046D:B342.000A/input/input30
[79938.987536] input: Keyboard K380 Consumer Control as /devices/pci0000:00/0000:00:13.1/usb6/6-2/6-2:1.0/bluetooth/hci0/hci0:11/0005:046D:B342.000A/input/input31
[79938.987635] input: Keyboard K380 System Control as /devices/pci0000:00/0000:00:13.1/usb6/6-2/6-2:1.0/bluetooth/hci0/hci0:11/0005:046D:B342.000A/input/input32
[79938.987741] hid-generic 0005:046D:B342.000A: input,hidraw3: BLUETOOTH HID v42.01 Keyboard [Keyboard K380] on 5c:f3:70:a8:03:f6

sudo systemctl status bluetooth

● bluetooth.service - Bluetooth service
     Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor pre>
     Active: active (running) since Sat 2022-05-14 13:37:54 PDT; 22h ago
       Docs: man:bluetoothd(8)
   Main PID: 815 (bluetoothd)
     Status: "Running"
      Tasks: 1 (limit: 4224)
     Memory: 2.4M
     CGroup: /system.slice/bluetooth.service
             └─815 /usr/lib/bluetooth/bluetoothd

May 14 13:37:50 linuxman-IdeaCentre systemd[1]: Starting Bluetooth service...
May 14 13:37:51 linuxman-IdeaCentre bluetoothd[815]: Bluetooth daemon 5.53
May 14 13:37:54 linuxman-IdeaCentre systemd[1]: Started Bluetooth service.
May 14 13:37:54 linuxman-IdeaCentre bluetoothd[815]: Starting SDP server
May 14 13:37:55 linuxman-IdeaCentre bluetoothd[815]: Bluetooth management inter>
May 14 13:38:31 linuxman-IdeaCentre bluetoothd[815]: Endpoint registered: sende>
May 14 13:38:31 linuxman-IdeaCentre bluetoothd[815]: Endpoint registered: sende>
May 14 13:42:06 linuxman-IdeaCentre bluetoothd[815]: Can't get HIDP connection >
May 15 11:49:42 linuxman-IdeaCentre bluetoothd[815]: Can't get HIDP connection >

It is set to "always visible", but it does appear those "Can't get HIDP connection" errors could be something, but I'm so unsure haha.

But yeah! Bluetooth seems to be a huge pain here lol. I had issues with Wifi adapters at first until I looked into one that could be plug-and-play. This bluetooth adapter was supposed to be the same deal but now I'm like  :024:

Doesn't sound good, but simple things first. Is the adapter set to 'always visible'?
Does the command 'dmesg | grep -i blue' show the same result as before?
Does the command 'sudo systemctl status bluetooth' show any errors?
Bluetooth can really be a a pain in the ....   >:(

Thanks for the response and advice.

So, after downloading that driver, resetting my system, and troubleshooting further to check if this works, now its doing something else.

My mouse connects, pairs, and works well now. Even when I restart my pc, the mouse reconnects itself and is good to go. However, my keyboard acts different.

I can connect to it only; if I try to "pair", the pairing will always fail. Despite this, after connecting, the keyboard is functional until I restart my pc. Unlike the mouse I'm using, this keyboard will not reconnect itself. I end up having to remove it as a device in my bluetooth manager, put it in pairing mode, research for it, then I have to "connect" to it, because pairing will always fail. This process seems to repeat after every restart of my pc. Looking back, I think the bluetooth is overall more stable in general now. So, I guess its functional, but it would be awesome if the keyboard could maintain its connection.

If you have any further suggestions, I would be eager to listen. Thanks for your help!

I guess the driver is not installed. I found this post in the Linux Mint forum to add the driver for your BCM20702A0
The post is three years old, but the wget link still works.


They used the following commands to install the driver (I don't think you need the rfkill command):

sudo wget https://s3.amazonaws.com/plugable/bin/fw-0a5c_21e8.hcd -O /lib/firmware/brcm/BCM20702A1-0a5c-21e6.hcd
sudo rfkill unblock bluetooth


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