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Thread: Bluetooth found but not found

  1. #1
    Join Date
    Jan 2006
    Beans
    368

    Bluetooth found but not found

    Hi Everyone,

    I am trying to get Bluetooth working on an HP Probook 4540s and have the following strange situation ...

    systemctl detects the bluetooth device ...

    Code:
    # systemctl | grep -i blue
      sys-devices-pci0000:00-0000:00:1c.3-0000:03:00.0-net-wlo1.device                         loaded active plugged   RT3290 Wireless 802.11n 1T/1R PCIe (Ralink RT3290LE 802.11bgn 1x1 Wi-Fi and Bluetooth 4.0 Combo Adapter)
      sys-subsystem-net-devices-wlo1.device                                                    loaded active plugged   RT3290 Wireless 802.11n 1T/1R PCIe (Ralink RT3290LE 802.11bgn 1x1 Wi-Fi and Bluetooth 4.0 Combo Adapter)
      bluetooth.service                                                                        loaded active running   Bluetooth service
    ... but BlueMan cannot find an adaptor ...

    Code:
    # sudo blueman-manager
    blueman-manager version 2.1.2 starting
    blueman-manager 20.22.18 ERROR    Manager:118 on_dbus_name_appeared: Default adapter not found, trying first available.
    blueman-manager 20.22.18 ERROR    Manager:122 on_dbus_name_appeared: No adapter(s) found, exiting
    Has anyone got an idea what is happening here? And how can I fix it?

    Many thanks,
    Alan in Cologne

  2. #2
    Join Date
    May 2014
    Location
    /home
    Beans
    9,045
    Distro
    Ubuntu 18.04 Bionic Beaver

    Re: Bluetooth found but not found

    That device has been problematic for years, there was a partial fix available in the past if you search for RT3290 bluetooth Ubuntu. I haven't kept up and don't know if they made progress or gave up

  3. #3
    Join Date
    Jan 2006
    Beans
    368

    Re: Bluetooth found but not found

    Hallo Jeremy,

    Many thanks for that tip!

    I will take a look and see what is available and otherwise get hold of an external (USB) bluetooth device. Does anyone have any tips for a good one of those?

    I'll keep you posted on what I find out.

    Thanks,
    Alan

  4. #4
    Join Date
    Jan 2006
    Beans
    368

    Re: Bluetooth found but not found

    Jeremy,

    Many thanks: With this link ...

    https://webwiks.com/techcorner/get-r...work-in-linux/

    I managed to get the ralink RT3290 working and scanning for devices. I was very pleased.

    It found both devices that I needed to test and they worked perfectly.

    Excellent, excellent, excellent.

    Many thanks,
    Alan

  5. #5
    Join Date
    Jan 2006
    Beans
    368

    Re: Bluetooth found but not found

    Hallo Everyone,

    The link above managed to fix the problem but only when Blueman is opened with root (sudo) permissions. Otherwise the standard installation of Blueman still fails to see devices.

    I have to do the following ...

    Code:
    # sudo modprobe rtbth
    # sudo blueman-manager
    Then the "device browser" appears and I can connect to (for example) a bluetooth speaker.

    But that is a lot of extra effort so does anyone know how I could transfer this to make it apply to the normal (non-root) instance of bluetooth? Maybe I could embed those commands in a configuration file?

    Many thanks.

    Yours,
    Alan

  6. #6
    Join Date
    Aug 2011
    Location
    Berlin, Germany
    Beans
    7,868
    Distro
    Ubuntu Mate 16.04 Xenial Xerus

    Re: Bluetooth found but not found

    Try
    Code:
    sudo apt-get install --reinstall rtbth-dkms blueman

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