noemi ideas are valid but I think if CM11 because they are still unstable ...... nighly screen notifications off active screen off .... I did not touch anything in the kernel .. the phone only reboot as with all non-CM11 and a problem of my phone because I happen only with the CM11 .. maybe there are too many settings that our phone does not support ... a rom compiles ok but then you have to fix the problems and so useless ..