Marshmallow

[chrisblessing]

Greetings,

My Nexus 7, gen 2, has an issue whereby the screen comes out of lock screen about every 20 seconds. It remains on for 5 seconds and then goes off, only to come on again 20 or seconds later.

Things I've done recently:
1 update (OTA) to Android 6.0 and, soon after, 6.0.1
2 change battery
3 factory reset
4 deep discharge battery calibration

Even without having installed any apps after a factory reset the issue appears, ruling out any errant apps. I've obviously cleared the cache, battery life is fine and seems to be calibrated.

I'm at a loss and open to any suggestions.

Many thanks.

Chris