How to enable hard-blocked bluetooth in Thinkpad Edge 320

after 5-10 bios resets to re-enable bluetooth during the last two years I decided to investigate this issue again. looks like there is a bluetooth switch emulation in the thinkpad_acpi module. turn this on via module options et voila -> working bluetooth!

echo options thinkpad_acpi dbg_bluetoothemul=1 bluetooth_state=1 | sudo tee -a /etc/modprobe.d/thinkpad_acpi.conf

reboot && block/unblock bluetooth as needed:

rfkill unblock all

I was also facing the same problem before. I had the parallel installation of Windows. For working of blue-tooth, if I needed to start the blue-tooth option, I enable it with F9 function key of Windows. Then it starts working in Linux. If you have Windows installation there just check this case.