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Trying to launch a BT adapter/manager(default installed on Lubu)a little window informs me that it cannot because there's no Bluez launched.

In terminal: sudo apt install bluez, it answers: Bluez is already the new version (5.46-0ubuntu3) Then invites me to remove a couple of obsolete packages.

So where's Bluez Daemon to launch?

Writing:systemctl status bluetooth.service ; hcitool dev

Answer: 

bluetooth.service - Bluetooth service
   Loaded: loaded (/lib/systemd/system/bluetooth.service; enabled; vendor preset
   Active: inactive (dead)
     Docs: man:bluetoothd(8)

Command:lspci -k | grep -A3 -i "wireless\|network\|bluetooth" Answer: 04:00.0 Ethernet controller: Qualcomm Atheros AR242x / AR542x Wireless Network Adapter (PCI-Express) (rev 01) Subsystem: Quanta Microsystems, Inc AR242x / AR542x Wireless Network Adapter (PCI-Express) Kernel driver in use: ath5k Kernel modules: ath5k 0f:06.0 CardBus bridge: Texas Instruments PCIxx12 Cardbus Controller oem@oem-Extensa-5220:~$

Vallu
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  • Update your question with output of `systemctl status bluetooth.service` and `hcitool dev`. – N0rbert Apr 12 '18 at 20:57
  • Sorry to bother, NOrbert, but I'm a real newbie; could you give me precise instructions? you mean I gotta write those linesdirectly after the cited answer? – Vallu Apr 13 '18 at 08:25
  • Open terminal in your system, enter the command above (`systemctl status bluetooth.service ; hcitool dev`) to it, hit ``, copy the output of command to clipboard, click [*edit* link to edit your question here](https://askubuntu.com/posts/1024332/edit) and paste command output here. – N0rbert Apr 13 '18 at 08:54
  • So it seems that you do not have bluetooth hardware. Do you have any? Add output of `lspci -k | grep -A3 -i "wireless\|network\|bluetooth"` to the question. – N0rbert Apr 13 '18 at 09:58
  • I'm not completely sure, but it seems that you do not have Bluetooth PCI devices. Are you using USB one (connect it and add `lsusb` to the question)? – N0rbert Apr 13 '18 at 10:57
  • NOrbert, sorry, after your answer I'm realizing this old Laptop doesn't have any BT. Dunno why I didn't think of this before, probably I assumed it as it has got Wifi. Should I delete the Question or do u think it may be useful to someone else? – Vallu Apr 13 '18 at 11:06
  • I summarized steps as answer to help other users. – N0rbert Apr 13 '18 at 11:26

1 Answers1

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Do determine the status of Bluetooth subsytem you can do the following

  1. Install needed bluez component:

    sudo apt install bluez

  2. Check that your hardware has Bluetooth functionality (on PCI and USB), find adapter's serial:

    lspci -k | grep -A3 -i "wireless\|network\|bluetooth"
lsusb | grep -i "bluetooth\|radio"
hcitool dev

  3. Check that adapter is not blocked by rfkill and then unblock it:

    sudo rfkill list all
sudo rfkill unblock all

  4. Check the status of corresponding systemd service:

    systemctl status bluetooth.service

And of course you can determine the model of your device (for example, laptop), and check Bluetooth existence here.

N0rbert
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