On an Intel Compute Stick the Xubuntu 18.04 upgrade to 20.04 resulted in
a working rtl8723bs bluetooth (and wifi) for a 5.4.0-29 kernel.  Before
upgrade, a 5.3 kernel was tested and three additional modules needed to
be loaded manually (the first time) to make the Bluetooth work: hidp,
btbcm, and rfcomm.  The 5.3 modules which originally loaded by default
(and allowed wifi but not Bluetooth) were: btrtl, btqca, btintel,
hci_uart, and bnep.  The working 5.4 had dmesg Bluetooth/hci firmware
load messages identical to the above 4.19 examples.  The hardware works,
the firmware is present, but there seems to be a module load problem

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https://bugs.launchpad.net/bugs/1877192

Title:
  RTL8723bs bluetooth not working on 20.04

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