Comment 16 for bug 750428

Same problem here. The repeating message in DMESG output is:
[ 1683.459073] toshiba_bluetooth: Re-enabling Toshiba Bluetooth
[ 1683.541228] usb 1-1.2: USB disconnect, device number 88
[ 1684.053096] usb 1-1.2: new full-speed USB device number 89 using ehci-pci
[ 1684.246487] usb 1-1.2: New USB device found, idVendor=8087, idProduct=07da
[ 1684.246499] usb 1-1.2: New USB device strings: Mfr=0, Product=0, SerialNumber=0

Interestingly enough, all this re-enabling is increasing the interface number:

$ rfkill list
...
340: hci0: Bluetooth
 Soft blocked: yes
 Hard blocked: no
...

(wait a bit)
$ rfkill list
...
357: hci0: Bluetooth
 Soft blocked: yes
 Hard blocked: no
...