Screen on for text messages?

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http://forums.androidcentral.com – So, I bought the HTC One X 3 days after it was released in Aus (Optus branded) and noticed that the screen didn't turn on to alert you when you received a text message - it only played a notification tone, and the LED flashed at you. Upgraded to Jelly Bean last night and still no change. I'm using an app at the moment, but is there a setting or something for it? Also, double notifications for emails! It's so annoying. I'll get an email through (hotmail) then almost immediately after it'll ring and vibrate again to alert me. No idea what's going on. (HowTos)