The first thing is to find out what the origin of the problem is. Then, we can check if and how we can solve it (this does not necessarily mean deactivate it permanently; the acpitool deactivation of devices is just temporarily and intended to identify the origin). So, if your bluetooth is in the acpi list, try to deactivate it with acpitool as mentioned above and check out if the freeze still appears. If this is the problem, we might find alternatives to make it work in a way not causing freezes (… if the bluetooth proves to be the origin…). If it is not the bluetooth device, activate it again and try out the remaining devices one by one.
I just saw that I have not mentioned above how to use acpitool for that: -w (lowercase w) outputs information including the device numbers, -W (uppercase W) enables/disables devices with the device number, (e.g., sudo acpitool -W 3)