Bluetooth issues on Yosemite

I have a Macbook Pro Retina Mid 2012. Never had any issue before upgrading to Yosemite, but after upgrading my bluetooth does not work anymore if I boot the Mac without keeping the power adapter plugged in. The Bluetooth internal adapter does not recognize any device anymore e(even re-paring does not work).
If I plug the power adapter the situation does not change.
If I disable bluetooth, then disable wifi, than re enable bluetooth, it works. And I can also re enable the wifi.
If I reboot WITH the adapter plugged in, there is no issue at all.
Does anybody have a fix solution?
Clearing the PRAM did not help.

At first my MacBookPro (Yosemite) would not recognize my iHome speaker.  Then, I discovered that I had to have the positioning of the iHome speaker exact - and it would recognize it.
I discovered this accidentally.  It  happened that I had my iPhone by the MacBook Pro while I was trying to pair the laptop with the iHome - and I had the bluetooth window open on the laptop.  I picked up the phone to use, and suddenly the iPhone appeared on the MacBook's Bluetooth screen ready for pairing. The laptop's bluetooth recognized the iPhone and gave me the icon ready pairing with it . I then moved the iPhone a few inches away, and it's icon disappeared from my laptop's bluetooth screen. 
So, then I moved the iPhone around until I found which position it needed to be in for the laptop to recognize it.  Then I put the iHome speaker in that same position and tried the pairing again. I turned off the speaker (but not the laptop), turned it on again and pressed the pairing button on the back of the iHome speaker, and then this time the iHome icon did iappear in the MacBook Pro's Bluetooth menu and they successfully paired.

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