[Bug 263900] Bluetooth dysfunction with TP-Link UB500

From: <bugzilla-noreply_at_freebsd.org>
Date: Tue, 10 May 2022 18:00:02 UTC
https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=263900

            Bug ID: 263900
           Summary: Bluetooth dysfunction with TP-Link UB500
           Product: Base System
           Version: 13.0-RELEASE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: wireless
          Assignee: wireless@FreeBSD.org
          Reporter: xyesbee@protonmail.com

I own a TP-Link UB500 Bluetooth 5.0 Adapter, that works with Linux and Windows
out of the box. I followed the instructions on official FreeBSD documentation
but unfortunately that did not work out.

  # service bluetooth start ubt0hci
  /etc/rc.d/bluetooth: ERROR: Unable to setup Bluetooth stack for device
ubt0hci
  # service bluetooth start ubt0hci
  /etc/rc.d/bluetooth: ERROR: Unable to setup Bluetooth stack for device
ubt0hci
  # service bluetooth start ubt0hci
  /etc/rc.d/bluetooth: ERROR: Unable to setup Bluetooth stack for device
ubt0hci

Then I tried with removing the `hci' part.

  # service bluetooth start ubt0
  /etc/rc.d/bluetooth: ERROR: Unable to setup Bluetooth stack for device ubt0
  #

Up to this point, it was clear it does not support the device but the weird
part is when the next attempt occurs.

  # service bluetooth start ubt0
  #

I see a fake light of hope but as soon as I run inquiry.

  # hccontrol inquiry
  Inquiry complete. Status: No error [00]

It becomes clear that the Bluetooth stack is messed up because I have
discoverable Bluetooth devices nearby.

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