Cfxtrjtrk

Whenever I turn my bluetooth off from the settings menu, it's back on after reboot. I know this has already been asked but I've tried all answers that have been provided and nothing seems to work.

The most popular suggestion is: Run sudoedit /etc/rc.local and add this before line with exit 0:

rfkill block bluetooth

When I do this, an empty file opens up and it's not even rc.local if I'm correct. (see screenshot).
I'm running Ubuntu 18.04 LTS.

If I run ls -l /etc/rc.local this comes up:

If I run: sudo rfkill list all:

I've tried everything in this link except installing BUM: How can I deactivate Bluetooth on system startup?

I've tested this and it's persistent across reboots.

Click the bluetooth logo between the keyboard and battery icons on the system tray. Then click the "Bluetooth ON" selection and it changes to "Bluetooth OFF":

After comments I discovered that Ubuntu 18.04 with Gnome interface doesn't work like Ubuntu 16.04 with Unity interface.

The solution is to edit /etc/default/tlp and find:

# Radio devices to disable on startup: bluetooth, wifi, wwan.

# Separate multiple devices with spaces.

#DEVICES_TO_DISABLE_ON_STARTUP="bluetooth wifi wwan"

Edit the last line to read:

DEVICES_TO_DISABLE_ON_STARTUP="bluetooth"

Well, I have a suggession. I think most of the people will try to make the devices to remember the state of the previous shutdown. Thus if wifi/bluetooth is turned off/on before the previous shutdown, then after rebooting, wifi/bluetooth remains off/on according the previous state.

To do this, go to the file /etc/default/tlp and search for the line

RESTORE_DEVICE_STATE_ON_STARTUP=0

This is set as "0" by default, which means that remembering the state of radio is disabled by default. To make it remember the previous state, replace "0" with "1".
If you set this as "1", the lines after that will not be read by the system.

If you specifically wants to set some radio to be on or off at start up, then follow the lines

#DEVICES_TO_DISABLE_ON_STARTUP="bluetooth wifi wwan"

and

#DEVICES_TO_ENABLE_ON_STARTUP="bluetooth wifi wwan"

and remove the '#' to activate any of those line. And you can choose between bluetooth/wifi/wwan or all of them.

Do as you need.

I have a workaround for your case...

I'm using Ubuntu Mate 18.04, in my case I just click on "MENU/Preferences/Startup Applications".
A window called "Startup Applications Preferences" pops up. Find the entry called "Blueman Applet" and remove the tick/tag from it so that it becomes disabled (grayed out). As a result, all the applications related with Bluetooth will not load the next time(s) you boot up your system.

The annoying part is that you will have to reverse this procedure and reboot to get bluetooth back to work in case you need it.

Hope this helps
JaMedSyS

the rc.local way appears right to me, yet I'd do it slightly different:

sudo nano /etc/rc.local

either the file is empty - it has just been created by you - or not, edit it to look like this:

#!/bin/sh

rfkill block bluetooth

exit 0

the first and last lines are important.