It is definitely something that started after the 3.16 rom was installed for me as I have downgraded back down to 2.17 and it hasn't done it at all. Perhaps there is just an application that is installed on the phone that causes it to time out? And just in case it gets lost in the thread, here is my existing post.
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Originally Posted by
quantum_kaos 
The 3.16 rom works wonderfully, however there is one small problem... I have done a little searching and I haven't been able to discover anyone with the same problem. Hopefully posting will help find a solution.
After installing 3.16, there are times when my phones screen "sleeps" (after 2 minutes to conserve power) but I won't be able to turn the screen back on without doing a soft reset. My only way to avoid this is to adjust my power settings to ensure the screen never shuts off when it is unplugged or plugged in. Obviously, that defeats the whole purpose of trying to conserve battery life hah. Hope someone can help, perhaps it's a simple registry fix.
If it isn't, where can I obtain Sprint's Stock 2.17 ROM? Or, does anyone have any suggestions of what ROM I could use? For t he record, my carrier is Sprint. :P"