[GUIDE]How to fix crashing & ADB not connecting
I've seen and had problems with my P769 a while back where I had crashes and couldn't connect through ADB. From what I could tell, there was a lack of posts having the solution. So I thought I would contribute by quickly PUTTING TOGETHER not CREATING the fix. All credit goes to Kuma for helping me and giving me his persist.img!
So far I've tried this on the p769 and metro, I don't know the inner-workings of the fix so try at your own risk
1. Download Kuma's Persist.img here: https://mega.co.nz/#!8pt0xCqA!3-uV70...YNU0KDUqQRVVbo
2. Download and extract, if you haven't already, fastboot here: http://forum.xda-developers.com/show....php?t=2292828
3. Put the persist.img in the yours fastboot folder
4. Start fastboot option 1 and run the command : fastboot flash persist persist.img
Hopefully this will fix most, if not all of your ADB problems and crashes.