I have my Nexus 5 since early february, rooted it, running stock KK no problem.
I flashed the Android L preview a few days after its release to test it a few weeks.
As I wasn't sastified with this preview and the lack of many my little rooted convenience, a few days I went back to KK 4.4.4 and flashed the ElementalX kernel.
Since then when I plug it into anything (computer or just charger) it generally stays just fine until the screen shuts off -during this time I can use normally- or report a system error saying the UI has crashed. I can't use it anymore and I have to unplug it and reboot it.
After rebooting it loses the wallpaper I had setup, as far as I can see it's the only setting it loses.
As I hadn't had this problem with L, I went back to it. And same problem.
Do you know anything about that ? I searched this forum and the only thing that seemed to be near was this thread, but it doesn't exactly corrolate.