HTC One Accelerometer Not Working

I have a working application using the accelerometer that works on other devices. On the HTC One, the watchAccelerometer call does not fire either the success or error callbacks. It just fails silently.

To eliminate the possibility of coding error, I have taken demo projects from online tutorials - which again work on other devices, but not the HTC One.

Other non-phonegap apps are still working. The phone successfully re-orients.