[Q] Logcat broken - adb works topic

Hello,

i got a problem with my logcat. I get no output. I tried "adb logcat" or the app "Logcat Viewer" with root.
What i have done so far:
I installed Xposed and multirom - i also uninstalled both for testing - no changes.
I tried deleting the /dev/logs/

Some infos:
Right now i'm on 4.4.4 (CM 11.0-XNPH44S)
Kernel: 3.4.104~AK.077.OPO.CM11

What can i do? I also got another OnePlus One with the same setup and it's working flawless there...

Thanks for any help