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I'm running a Ubuntu 22.04 on an MSI CX61 2QC laptop. I'm having some problems with bluetooth and I suspect they might be caused by an out-of-date driver, or even by the fact that there is no driver for this device for Linux.

To check what kind of bluetooth device my laptop has, I have done:

dmesg | grep -i blue
[    1.447635] usb 1-1.3: Product: RT Bluetooth Radio
[    2.570559] Bluetooth: Core ver 2.22
[    2.570584] NET: Registered PF_BLUETOOTH protocol family
[    2.570586] Bluetooth: HCI device and connection manager initialized
[    2.570591] Bluetooth: HCI socket layer initialized
[    2.570593] Bluetooth: L2CAP socket layer initialized
[    2.570597] Bluetooth: SCO socket layer initialized
[    2.643774] Bluetooth: hci0: RTL: examining hci_ver=06 hci_rev=0e3d lmp_ver=06 lmp_subver=a5b1
[    2.643780] Bluetooth: hci0: RTL: unknown IC info, lmp subver a5b1, hci rev 0e3d, hci ver 0006
[    2.643783] Bluetooth: hci0: RTL: assuming no firmware upload needed

Blueetooth seems to be connected through USB somehow, so I have done:

lsusb
[...]
Bus 001 Device 004: ID 13d3:3394 IMC Networks Bluetooth
[...]

How can I install drivers for that?

EDIT

After disabling Windows Fast Boot as explained below, I know see the following in dmesg:

[    1.727956] usb 1-1.3: Product: RT Bluetooth Radio
[    2.668492] Bluetooth: Core ver 2.22
[    2.668518] NET: Registered PF_BLUETOOTH protocol family
[    2.668520] Bluetooth: HCI device and connection manager initialized
[    2.668525] Bluetooth: HCI socket layer initialized
[    2.668527] Bluetooth: L2CAP socket layer initialized
[    2.668533] Bluetooth: SCO socket layer initialized
[    2.840932] Bluetooth: hci0: RTL: examining hci_ver=06 hci_rev=0e3d lmp_ver=06 lmp_subver=a5b1
[    3.784039] Bluetooth: hci0: RTL: examining hci_ver=06 hci_rev=000b lmp_ver=06 lmp_subver=1200
[    3.784046] Bluetooth: hci0: RTL: loading rtl_bt/rtl8723a_fw.bin
[    4.551112] Bluetooth: hci0: RTL: fw version 0x0e3da5b1
[    4.811045] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[    4.811052] Bluetooth: BNEP filters: protocol multicast
[    4.811057] Bluetooth: BNEP socket layer initialized
[    4.812603] Bluetooth: MGMT ver 1.22
Dan
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    Try looking on the database for the driver. https://linux-hardware.org/index.php?id=usb:13d3-3410 – David Feb 11 '23 at 17:27
  • I have found it exactly here: https://linux-hardware.org/?id=usb:13d3-3394. With this, am I supposed to download the driver from somewhere? – Dan Feb 11 '23 at 17:38
  • Is it a dual boot with Windows? – Pilot6 Feb 11 '23 at 17:47
  • @Pilot6 yes, how do you know it? – Dan Feb 11 '23 at 17:48
  • It is a guess. Shut down Windows properly and check. You need to disable Fast Startup feature. Windows doesn't really shut down and this creates problems for some devices. – Pilot6 Feb 11 '23 at 17:51
  • I tried it and now it seems the device is recognized. Alas, my bluetooth problem (not being able to connect to a device with bluetoothctl) persists – Dan Feb 11 '23 at 18:41
  • At least firmware is now loading. – Pilot6 Feb 11 '23 at 20:28

1 Answers1

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This is a Realtek device. More precise it is a Realtek 8723AE chip. You can find this out from log messages with RTL and kernel source code btusb.c

{ USB_DEVICE(0x13d3, 0x3394), .driver_info = BTUSB_REALTEK },

These messages show that the IC is not well supported by Linux kernel:

[    2.643774] Bluetooth: hci0: RTL: examining hci_ver=06 hci_rev=0e3d lmp_ver=06 lmp_subver=a5b1
[    2.643780] Bluetooth: hci0: RTL: unknown IC info, lmp subver a5b1, hci rev 0e3d, hci ver 0006
[    2.643783] Bluetooth: hci0: RTL: assuming no firmware upload needed

Maybe some firmware is needed.

My suggestions are:

  1. Try to install the latest mainline kernel and check how it works there. Maybe support for this device has been already added.

  2. If p.1 doesn't help, report a bug to Launchpad by running

     ubuntu-bug linux

If the installation is a dual-boot with Windows, disable Windows Fast Startup feature and check if it helps.

Pilot6
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