Bluez-can't start bluetooth.service

Question

i have downgraded my bluez version from 5 to 4.79.First i uninstalled bluez5 with sudo apt-get purge and then i did sudo apt-get autoremove. Then i wget the tar file and did the classic ./configure , make , sudo make install without errors.

The problem is that: $ systemctl status bluetooth output is:

*bluetooth.service 
   Loaded: not-found (Reason: No such file or directory)
   Active: inactive (dead)

So when i try to $ sudo systemctl start bluetooth the output is:

Failed to start bluetooth.service : Unit bluetooth.service failed to load: No such file or directory

$ bluetoothd -v output:

4.79

How can i start the bluetooth service and why is the bluetooth.service file is missing? I am new to linux and i run bluez on rp1 with raspbian jessie. Any help appreciated.

Solution

$ sudo systemctl enable bluetooth
Failed to enable unit: Unit file bluetooth.service does not exist.

I was getting above error so I tried to install all bluez package and it worked.

sudo apt-get install bluez*

after installation, I have enabled Bluetooth

$ sudo systemctl enable bluetooth
Synchronizing state of bluetooth.service with SysV service script with /lib/systemd/systemd-sysv-install.
Executing: /lib/systemd/systemd-sysv-install enable bluetooth

$ sudo systemctl start bluetooth

Comments

[Thanos M]

I remember trying that and it wasn't the solution. As a workaround, I end up not using bluez at all.

[maxime1992]

It's the only thing that worked for me using a dongle with Bluetooth 5.0 (on a PI). Thanks a lot!