After the update, the attentive display never worked! It used to work spot-on running 4.4.4.. I read this thread and thought maybe i should clear system cache.. followed the procedure on moto site.. but couldn't get past step 5.. No matter how I tried, holding down VOL UP for 5-10-15-20 secs (tried all), and hitting power simultaneously, it just dint work... I had to reboot like 4-5 times before i gave up.. Now i was reading a document and it works again! The screen dint go off. I faced my phone away and turned towards me right when it dims and it lit up again (that's my test for attentive display).. I dunno what happened there.. But hope it stays this way...
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Now its not working again!!
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It looks like they changed the procedure to clear cache in android L.
Here's the new one:
Turn off the device.
Press and hold the Volume Down button, then press and hold the Power button at the same time until the phone turns on.
Press the Volume Down button twice to highlight "Recovery mode."
Press the Power button to start recovery mode. An Android robot with a red exclamation mark will display.
While holding down the Power button, press and release the Volume Up button.
Use the volume buttons to scroll to "wipe cache partition," then press the Power button to select it.
Press the Power button to select reboot system now.
After clearing system cache, attentive display is working again.