I've got a Droid X that's been operating fine since a did a hard reset on it a couple weeks ago. Recently however the vibration function has completely ceased. I can't seem to find a setting to set the "strength" of the feedback- is there such a setting? The phone is running Gingerbread (2.3.3) build 4.5.602.
On my Galaxy S, the vibration settings are under
Settings -> Sound. The Vibrate option has 4 choices (Always, Never, Only in silent mode, and Only when not in silent mode) and when the Haptic feedback option is checked, Vibration intensity can be set to 0, 1, 2, 3, 4, or 5 but I don't think that affects regular vibrations.