Goto settings, accessibility and at the top it should say services. Anything in that section, click on each one and turn off. Like shown here. Notice talkback and Vibration notifier say off. If anything is on it services, it effects the lock screen. Even off, my vibration notifier works so not sure how it will effect anything you may have there. I'm stock and non-rooted. Hope this helps
Sent from my HTCONE using xda app-developers app
Sent from my HTCONE using xda app-developers app
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