Bluetoothd is running, but not discovering devices

English Hardware
1

The bluetooth hardware works on this computer under Windows. In the KDE bluetooth widget I only see one device which I don’t recognize. There are lots of devices in range.

When I use ‘bluetoothctl discoverable on’ I can see the computer and pair with it from my phone. ‘bluetoothctl scan on’ shows “SetDiscoveryFilter success”, but no devices are shown. A subsequent ‘bluetoothctl scan on’ results in “Failed to stop discovery: org.bluez.Error.Failed”.

I also get the following, the last two lines of which may be relevant:

hattons@localhost:~> sudo service bluetooth status
* bluetooth.service - Bluetooth service
     Loaded: loaded (/usr/lib/systemd/system/bluetooth.service; enabled; preset: disabled)
     Active: active (running) since Sun 2024-06-23 01:08:34 EDT; 7s ago
       Docs: man:bluetoothd(8)
   Main PID: 26126 (bluetoothd)
     Status: "Running"
      Tasks: 1 (limit: 4915)
        CPU: 22ms
     CGroup: /system.slice/bluetooth.service
             `-26126 /usr/lib/bluetooth/bluetoothd

Jun 23 01:08:34 localhost.localdomain bluetoothd[26126]: Endpoint registered: sender=:1.70 path=/MediaEndpoint/A2DPSink/sbc_xq_453
Jun 23 01:08:34 localhost.localdomain bluetoothd[26126]: Endpoint registered: sender=:1.70 path=/MediaEndpoint/A2DPSource/sbc_xq_453
Jun 23 01:08:34 localhost.localdomain bluetoothd[26126]: Endpoint registered: sender=:1.70 path=/MediaEndpoint/A2DPSink/sbc_xq_512
Jun 23 01:08:34 localhost.localdomain bluetoothd[26126]: Endpoint registered: sender=:1.70 path=/MediaEndpoint/A2DPSource/sbc_xq_512
Jun 23 01:08:34 localhost.localdomain bluetoothd[26126]: Endpoint registered: sender=:1.70 path=/MediaEndpoint/A2DPSink/sbc_xq_552
Jun 23 01:08:34 localhost.localdomain bluetoothd[26126]: Endpoint registered: sender=:1.70 path=/MediaEndpoint/A2DPSource/sbc_xq_552
Jun 23 01:08:34 localhost.localdomain bluetoothd[26126]: Endpoint registered: sender=:1.70 path=/MediaEndpoint/A2DPSink/faststream
Jun 23 01:08:34 localhost.localdomain bluetoothd[26126]: Endpoint registered: sender=:1.70 path=/MediaEndpoint/A2DPSource/faststream
Jun 23 01:08:35 localhost.localdomain bluetoothd[26126]: Failed to load LTKs for hci1: Invalid Parameters (0x0d)
Jun 23 01:08:35 localhost.localdomain bluetoothd[26126]: Failed to load IRKs for hci1: Invalid Parameters (0x0d)
hattons@localhost:~>
2

Bluetooth is never easy to debug and often it can have to do with the card, not a BT card are that good support by Linux.

Can you share the output of “lsusb | grep -i blue” and “lspci | grep -i blue” I like to see which bluetooth card you have.

3

Neither command produced anything. I did get this:

localhost:~ # hwinfo --bluetooth
02: USB 00.0: 11500 Bluetooth Device                            
  [Created at usb.122]
  Unique ID: xMQR.X91Y84C4of4
  Parent ID: wkjR.RCJcL1C9RGA
  SysFS ID: /devices/pci0000:00/0000:00:14.0/usb1/1-5/1-5.3/1-5.3:1.0
  SysFS BusID: 1-5.3:1.0
  Hardware Class: bluetooth
  Model: "Intel Bluetooth Device"
  Hotplug: USB
  Vendor: usb 0x8087 "Intel Corp."
  Device: usb 0x0036 
  Driver: "btusb"
  Driver Modules: "btusb"
  Speed: 12 Mbps
  Module Alias: "usb:v8087p0036d0000dcE0dsc01dp01icE0isc01ip01in00"
  Driver Info #0:
    Driver Status: btusb is active
    Driver Activation Cmd: "modprobe btusb"
  Config Status: cfg=new, avail=yes, need=no, active=unknown
  Attached to: #38 (Hub)

From that I got the vendor and product hex codes 0x8087, 0x0036 and did “lsusb -d 8087:0036” to get Bus 001 Device 011: ID 8087:0036 Intel Corp. Using that I did “lsusb -vs 001:011” and got:

localhost:~ # lsusb -vs 001:011

Bus 001 Device 011: ID 8087:0036 Intel Corp. 
Device Descriptor:
  bLength                18
  bDescriptorType         1
  bcdUSB               2.00
  bDeviceClass          224 Wireless
  bDeviceSubClass         1 Radio Frequency
  bDeviceProtocol         1 Bluetooth
  bMaxPacketSize0        64
  idVendor           0x8087 Intel Corp.
  idProduct          0x0036 
  bcdDevice            0.00
  iManufacturer           0 
  iProduct                0 
  iSerial                 0 
  bNumConfigurations      1
  Configuration Descriptor:
    bLength                 9
    bDescriptorType         2
    wTotalLength       0x00c8
    bNumInterfaces          2
    bConfigurationValue     1
    iConfiguration          0 
    bmAttributes         0xe0
      Self Powered
      Remote Wakeup
    MaxPower              100mA
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        0
      bAlternateSetting       0
      bNumEndpoints           3
      bInterfaceClass       224 Wireless
      bInterfaceSubClass      1 Radio Frequency
      bInterfaceProtocol      1 Bluetooth
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x81  EP 1 IN
        bmAttributes            3
          Transfer Type            Interrupt
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x02  EP 2 OUT
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x82  EP 2 IN
        bmAttributes            2
          Transfer Type            Bulk
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0040  1x 64 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       0
      bNumEndpoints           2
      bInterfaceClass       224 Wireless
      bInterfaceSubClass      1 Radio Frequency
      bInterfaceProtocol      1 Bluetooth
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0000  1x 0 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0000  1x 0 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       1
      bNumEndpoints           2
      bInterfaceClass       224 Wireless
      bInterfaceSubClass      1 Radio Frequency
      bInterfaceProtocol      1 Bluetooth
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0009  1x 9 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0009  1x 9 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       2
      bNumEndpoints           2
      bInterfaceClass       224 Wireless
      bInterfaceSubClass      1 Radio Frequency
      bInterfaceProtocol      1 Bluetooth
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0011  1x 17 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0011  1x 17 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       3
      bNumEndpoints           2
      bInterfaceClass       224 Wireless
      bInterfaceSubClass      1 Radio Frequency
      bInterfaceProtocol      1 Bluetooth
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0019  1x 25 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0019  1x 25 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       4
      bNumEndpoints           2
      bInterfaceClass       224 Wireless
      bInterfaceSubClass      1 Radio Frequency
      bInterfaceProtocol      1 Bluetooth
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0021  1x 33 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0021  1x 33 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       5
      bNumEndpoints           2
      bInterfaceClass       224 Wireless
      bInterfaceSubClass      1 Radio Frequency
      bInterfaceProtocol      1 Bluetooth
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0031  1x 49 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x0031  1x 49 bytes
        bInterval               1
    Interface Descriptor:
      bLength                 9
      bDescriptorType         4
      bInterfaceNumber        1
      bAlternateSetting       6
      bNumEndpoints           2
      bInterfaceClass       224 Wireless
      bInterfaceSubClass      1 Radio Frequency
      bInterfaceProtocol      1 Bluetooth
      iInterface              0 
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x03  EP 3 OUT
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x003f  1x 63 bytes
        bInterval               1
      Endpoint Descriptor:
        bLength                 7
        bDescriptorType         5
        bEndpointAddress     0x83  EP 3 IN
        bmAttributes            1
          Transfer Type            Isochronous
          Synch Type               None
          Usage Type               Data
        wMaxPacketSize     0x003f  1x 63 bytes
        bInterval               1
Device Status:     0x0001
  Self Powered
5

Me too.

Try what I did. I installed blueman and use it to connect to my bluetooth devices.

6

It’s a pristine install, so I don’t expect that to be a problem. It may be that my hardware is too new for the configuration to be in the distro.

7

With blueman I can make this computer visible and find it with my phone. But I can’t see any devices when I scan for devices with blueman.

8

This issue seems to be the same as yours.

Can you try what is suggested there. If that not works, adding your experience to that issue makes sense to me.

9

I don’t think that’s the same problem. I can connect devices from the other end. That is, I can see my computer form my phone, and connect to it from my phone. What I can do is see my phone when I search using blueman, for example. I have no devices to delete since I can find any. I did delete my phone after connecting, but that changed nothing.

10

Nice to see it is an Intel BT card, likely good supported.

I did not read about the exact problem, I did check for the error messages " Failed to load LTKs/IRKs"

Does “bluetoothctl devices” report anything on your computer, following the issue I linked I would delete all devices.

11

It looks to have been a subtle hardware issue. I added an NVME card to the computer, after which the Bluetooth discovery on the Windows side stopped working. The motherboard (ROG MAXIMUS Z790 FORMULA w/i9-14900KS) came with an attachable external antenna. I attached it, and the Bluetooth discovery is now working great. I’m guessing the Motherboard and additional components interfere with RF communications, hence the need for the external antenna. I thought the antenna was only for WIFI, which I am not using. In the past, I have never needed to attach external antennae to get things to work on other computers.

1 Like
12

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