how to launch Bluez on Lubuntu

Question

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:~$

Solution

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.

Comments

[N0rbert]

Update your question with output of systemctl status bluetooth.service and hcitool dev.

[Vallu]

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?

[N0rbert]

Open terminal in your system, enter the command above (systemctl status bluetooth.service ; hcitool dev) to it, hit <Enter>, copy the output of command to clipboard, click edit link to edit your question here and paste command output here.

[N0rbert]

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]

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)?

[Vallu]

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?

[N0rbert]

I summarized steps as answer to help other users.