X220 Bluetooth periodical​ly disappears from system

I use a Bluetooth mouse on my X220 (4286-CTO) with Windows 8 Pro. For the past few months, the mouse sometimes stops working, and when I check the system tray the Bluetooth icon is gone and the Device Manager no longer shows a Bluetooth adapter. This popup may also appear in the system tray:
Bluetooth usually comes back if I reboot, but sometimes I have to reboot more than once. The Event Viewer has some error entries for BTHUSB that say "The Bluetooth driver expected an HCI event with a certain size but did not receive it."
I have the latest Bluetooth drivers from Lenovo. Is there anything I can do besides replace the Bluetooth daughterboard?
Solved!
Go to Solution.

Thanks for the suggestion. It does have a power management option:
I've been running with the option unchecked for the past week, but it's too early to come to a conclusion because the problem is intermittent. I did have one failure during the week so the problem is not completely gone. However, only one incident for the week is better than what I've been experiencing and it seems to be better.

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