problem with maclaw CM11, constantly restarts
Okay, with a little help i found an answer myself.this is for ppl struggling with the same problem:
To prevent those random restarts, you only have to experiment with your energy profile and your minimum clockspeed. change your CPU.(at least this worked for me) 
By default, min. clock is set at 100MHz and energyprofile is balanced. you've got to change either ONE of these. (or both if you like) I had to bump clockspeed up to 200MHz(still pretty big underclock) or change profile to powersaver. Never got the restart problem after this change, nor a problem with the dialer or the youtube app. Maybe cpu governor could be a solution too, but this did the trick for me. To unlock those options, if you can't find'em, google "cm11 developer options." then head to 'performance'.