Macbook Alum. Bluetooth not always working (50/50..)

[madTooth]

Good Evening

I am running Mint on my aluminum Mac-book (not pro) and everything works great except Bluetooth.
It works sometimes, but does not others (I'd say 50%)
When it works then everything is fine.
When is not working it is like not even detected; any command from terminal returns no info about bluetooth and I get no BT symbol beside the clock/calendar and If I run the Bluetooth software which is in the programs list, it appears a window with a BT symbol in the middle which is red crossed and no options or actions are available (see the picture attached).
At this point I have to switch off the laptop and turn it ON again (reboot is not enough) and finally it comes back and perfectly working.
When I get it working then I can have information from terminal like follows:

Alumimium Macbook late 2008

Kernel: 4.4.0-122-generic x86_64 (64 bit)
Desktop: Xfce 4.12.3
Distro: Linux Mint 18.1 Serena

lshw shows

description: Notebook
product: MacBook5,1 (System SKU#)
vendor: Apple Inc.
version: 1.0
serial: xxxxxxxxxxxxxxx
width: 64 bits
capabilities: smbios-2.4 dmi-2.4 vsyscall32
.....
*-usb:2
description: USB controller
product: MCP79 OHCI USB 1.1 Controller
vendor: NVIDIA Corporation
physical id: 6
bus info: pci@0000:00:06.0
version: b1
width: 32 bits
clock: 66MHz
capabilities: pm ohci bus_master cap_list
configuration: driver=ohci-pci latency=0 maxlatency=1 mingnt=3
resources: irq:18 memory:d3387000-d3387fff
*-usbhost
product: OHCI PCI host controller
vendor: Linux 4.4.0-122-generic ohci_hcd
physical id: 1
bus info: usb@4
logical name: usb4
version: 4.04
capabilities: usb-1.10
configuration: driver=hub slots=5 speed=12Mbit/s
*-usb
description: USB hub
product: BRCM2046 Hub
vendor: Apple Inc.
physical id: 1
bus info: usb@4:1
version: 1.00
capabilities: usb-2.00
configuration: driver=hub slots=3 speed=12Mbit/s
*-usb
description: Bluetooth wireless interface
product: Bluetooth USB Host Controller
vendor: Apple Inc.
physical id: 1
bus info: usb@4:1.1
version: 2.08
serial: 00236CA389B6
capabilities: usb-2.00 bluetooth
configuration: driver=btusb speed=12Mbit/s

sudo lspci
00:00.0 Host bridge: NVIDIA Corporation MCP79 Host Bridge (rev b1)
00:00.1 RAM memory: NVIDIA Corporation MCP79 Memory Controller (rev b1)
00:03.0 ISA bridge: NVIDIA Corporation MCP79 LPC Bridge (rev b2)
00:03.1 RAM memory: NVIDIA Corporation MCP79 Memory Controller (rev b1)
00:03.2 SMBus: NVIDIA Corporation MCP79 SMBus (rev b1)
00:03.3 RAM memory: NVIDIA Corporation MCP79 Memory Controller (rev b1)
00:03.4 RAM memory: NVIDIA Corporation MCP79 Memory Controller (rev b1)
00:03.5 Co-processor: NVIDIA Corporation MCP79 Co-processor (rev b1)
00:04.0 USB controller: NVIDIA Corporation MCP79 OHCI USB 1.1 Controller (rev b1)
00:04.1 USB controller: NVIDIA Corporation MCP79 EHCI USB 2.0 Controller (rev b1)
00:06.0 USB controller: NVIDIA Corporation MCP79 OHCI USB 1.1 Controller (rev b1)
00:06.1 USB controller: NVIDIA Corporation MCP79 EHCI USB 2.0 Controller (rev b1)
00:08.0 Audio device: NVIDIA Corporation MCP79 High Definition Audio (rev b1)
00:09.0 PCI bridge: NVIDIA Corporation MCP79 PCI Bridge (rev b1)
00:0a.0 Ethernet controller: NVIDIA Corporation MCP79 Ethernet (rev b1)
00:0b.0 SATA controller: NVIDIA Corporation MCP79 AHCI Controller (rev b1)
00:10.0 PCI bridge: NVIDIA Corporation MCP79 PCI Express Bridge (rev b1)
00:15.0 PCI bridge: NVIDIA Corporation MCP79 PCI Express Bridge (rev b1)
02:00.0 VGA compatible controller: NVIDIA Corporation C79 [GeForce 9400M] (rev b1)
03:00.0 Network controller: Broadcom Corporation BCM4322 802.11a/b/g/n Wireless LAN Controller (rev 01)

lsusb
Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 004 Device 003: ID 05ac:8213 Apple, Inc. Bluetooth Host Controller
Bus 004 Device 002: ID 0a5c:4500 Broadcom Corp. BCM2046B1 USB 2.0 Hub (part of BCM2046 Bluetooth)
Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub
Bus 001 Device 002: ID 05ac:8507 Apple, Inc. Built-in iSight
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 003 Device 003: ID 05ac:0236 Apple, Inc. Internal Keyboard/Trackpad (ANSI)
Bus 003 Device 002: ID 05ac:8242 Apple, Inc. Built-in IR Receiver
Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub

rfkill list
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
1: phy0: Wireless LAN
Soft blocked: no
Hard blocked: no
2: brcmwl-0: Wireless LAN
Soft blocked: no
Hard blocked: no

Any Clue on how to get it working every-time an not only "some" time?

Thanks in advance for the reply.
Regards
LM

[madTooth]

Any Clue?
I still have the problem

[madTooth]

It is a known macbook hardware issue.
I resolved it by resetting the SMC. To do that on a macbook do the folowing:

Step #1. Turn off your MacBook (any of the above version).

Step #2. Attach the power adapter to your Mac.

Step #3. Press Control+Shift+Option keys and power button together for some time and then release the keys.

Procedure is different for models other than macbook (iMac, mac mini etc..)