Bluetooth is disabled on Ubuntu 14.04

The bluetooth is disabled on my Ubuntu (Dell vostro Desktop with bluetooth USB adapter).

I plugged the bluetooth USB adapter into another Ubuntu desktop (12.04) and it is recognized instantaneously.

I've installed blueman, bluez, bluetooth support package.

The bluetooth system settings shows the message "bluetooth is disabled" even after I turn it on. Bluetooth status is not shown in the menu bar even though I checked this option.

rfkill list says bluetooth isn't blocked.

lsusb says the dongle is connected.

Bluetooth manager doesn't work... all buttons are grey.

Removing gnome-bluetooth (as some users suggest) not only doesn't fix the problem but also removes ubuntu-desktop, causing my system settings to be missing among other consequences.

Bluetooth option is not shown in the BIOS. Do I need to install a driver maybe? Does it exist?

All I want is to be able to connect my Apple mouse and keyboard to the PC.

Try this:

sudo hciconfig hci0 reset

This solved the problem for me.

Terminal output for

rfkill list
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: asus-wlan: Wireless LAN
    Soft blocked: no
    Hard blocked: no
2: asus-bluetooth: Bluetooth
    Soft blocked: no
    Hard blocked: no
3: phy0: Wireless LAN
    Soft blocked: no
    Hard blocked: no

After reading several other posts, I found this solution. Install gksu if not already installed.

sudo apt-get install gksu -y

Then edit /etc/rc.local and enter this line just before the "exit=0" entry.

gksudo gedit /etc/rc.local

In gedit before the last entry, which is "exit=0", enter:

rfkill unblock bluetooth

Then reboot and you should be able to turn on bluetooth, if not already enabled after reboot.

I just found a workaround for my Lenovo T400 running 14.04.2 LTS.

Scenario:

• Bluetooth was working
• I turned it off in settings panel.
• Now, when I try to turn it on, It turns itself off again.
• check 'rfkill list' and see that bluetooth is soft blocked.
• type 'sudo rfkill unblock bluetooth'
• check 'rfkill list' and see that bluetooth is still soft blocked.

Solution:

• Use the hardware switch on the front of the laptop to turn off the radios and then turn them back on.
• notice in control panel that bluetooth is now on.

You may have Fn-F8 or some such keyboard combination which may work for you.

This may not be the best solution but it gets me out of a bind for now.

I resolved this problem by running:

sudo chmod +x /usr/sbin/bluetoothd
sudo service bluetooth restart