same issue on N9005
I can't remember when it started but it's rendered the camera basically useless. Sometimes it finds focus and stops the vibration... what I found helps somewhat is shaking the phone rather violently, it stops vibration and then works as normal, untill I close the Camera app and go back into it, then same story. I can't think that this is a hardware issue as it is able to focus and take pictures just fine. This is a major annoyance but I don't think it's unsolveable. I'm no developer but may it be at all possible yo fix this with an xposed module or tweak that completely disables the vibration motor in the phone while in the camera app? Is this a possibility or is the problem deeper than that. I've tried loads of ROMs and it's present on all of them, the leaked Lollipop firmware as well. It's impossible to go back to Jelly Bean AFAIK but before I updated to Kit Kat I didn't have this issue.