witherspoon
Lurker
Hello! Sometimes, when I try to double tap the M8 to wake the screen, especially after not using the phone for a certain amount of time, it does not react and I must use the physical button to do so. This has happened to me quite often. It is not really that a big deal but I wondered if it is just a software bug and if my device has a problem. Has this happened to you too? Thank you.

The phone needs a little hint that you intend to unlock the screen. All that is needed is a gentle tap on one edge to wake the sensor and alert the phone and then the gesture. Tap pause then double tap...works 100% for me.