Originally Posted by djkeller3
Mind if I ask what tethering method you're using? If you're using Android Tether, would you mind sharing your configuration? Thanks!
Sent from my Kindle Fire using XDA Premium
ROM: CM9 ReloadedROM v1.2
Overclock: 1.2 GHz Max, 800 MHz min. On Demand
Launcher: ADW EX
Well, I'm using a Windows Phone (HTC Arrive on Sprint) with a custom ROM that enables native tethering in WP7. If you're on Android, that means nothing, and further more, other than making the phone a wifi hotspot, it gives no options or configurability past naming the wifi hotspot and setting a password. So unfortunately, that won't help you.
However, if it's related to the state of the phone's screen, it has to be something on the phone, or something related to how the Kindle requests a connection (maybe; I'm no expert on wifi). The Fire has no way to know when the phone's screen is on or off, or when that state changes, so it has to be something that the phone is doing. Now, whatever "that" is may be related to how it sees the Fire, and thus puts that connection to "sleep" when the Fire disconnects.
Again, I'm no expert on wifi or tethering; this is all just a guess. Perhaps someone else has a better answer.