Default Defy+ frequently unresponsive modem with cm11 kitkat quarx ROM

Hi,

I own a Defy+ and I wanted to give it a try with kitkat. With stock ROM I had no stability problems, but when I load kitkat after a few minutes I get a message on screen , saying the modem has a problem and the phone wants to reboot, giving the choice immediatly, remind later or not reboot.
This happens with quarx ROM from 20.1.2014, but also with older versions. I even went back to CM10.1, but it has the same modem problem.
Someone suggested to change CPU and Voltage to fix a reboot problem, but it did not make a difference.

I found some instructions how to create logs when the problem happens, I followed this instructions
http://forum.xda-developers.com/show...postcount=2104
and cat /proc/kmsg into a file on sd card while the modem message appeared on screen.

The file is attached, I hope it is usefull. If something else is needed to track down the problem, pls let me know.

defybooter
Attached Files
File Type: zip kmsg.txt.zip - [Click for QR Code] (17.7 KB, 6 views)