lsusb
Bus 002 Device 004: ID 046d:c52f Logitech, Inc. Unifying Receiver
Bus 002 Device 003: ID 0bda:8771 Realtek Semiconductor Corp. Bluetooth Radio
Bus 002 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 004: ID 04f2:b128 Chicony Electronics Co., Ltd USB2.0 UVC WebCam
Bus 001 Device 003: ID 0bda:0138 Realtek Semiconductor Corp. RTS5138 Card Reader Controller
Bus 001 Device 002: ID 8087:0020 Intel Corp. Integrated Rate Matching Hub
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
I have the drivers provided with the device but I do not know how to install this rtk_btusb module which is not found as you can see bellow:
root@toshiba//home/brad/Downloads/20201202_LINUX_BT_DRIVER# modprobe -vv btusb
modprobe: INFO: custom logging function 0x40c270 registered
insmod /lib/modules/5.15.161/kernel/drivers/bluetooth/btusb.ko reset=1
modprobe: ERROR: could not insert 'btusb': Unknown symbol in module, or unknown parameter (see dmesg)
modprobe: INFO: context 0x1b344b0 released
root@toshiba//home/brad/Downloads/20201202_LINUX_BT_DRIVER#
slapt-get -i kernel-huge kernel-headers kernel-modules kernel-firmware kernel-source
Reading Package Lists...Done
kernel-huge is up to date.
kernel-headers is up to date.
kernel-modules is up to date.
kernel-firmware is up to date.
kernel-source is up to date.
0 upgraded, 0 reinstalled, 0 newly installed, 0 to remove, 0 not upgraded.
Done
root@toshiba//home/brad/Downloads/20201202_LINUX_BT_DRIVER# modprobe -vv btusb
modprobe: INFO: custom logging function 0x40c270 registered
insmod /lib/modules/5.15.161/kernel/drivers/bluetooth/btusb.ko reset=1
modprobe: ERROR: could not insert 'btusb': Unknown symbol in module, or unknown parameter (see dmesg)
modprobe: INFO: context 0x1b344b0 released
root@toshiba//home/brad/Downloads/20201202_LINUX_BT_DRIVER#
I suggest you reinstall the kernel-modules package and reboot. Then try loading the btusb module again. I'm guessing that the make install you ran replaced it.
mv /lib/modules/5.15.161/kernel/drivers/bluetooth/btusb.ko /lib/modules/5.15.161/kernel/drivers/bluetooth/btusb_bak
mv: cannot stat '/lib/modules/5.15.161/kernel/drivers/bluetooth/btusb.ko': No such file or directory
I can confirm /lib/modules/5.15.161/kernel/drivers/bluetooth/btusb_bak is there