No logcat messages with LG K4 (X230)

[Android Central Question]

I am using LG K4 (X230, Android 6.0) to debug an app with android studio 3.4 and dont get any logcat messages.
Using same app and USB cable with LG Q6 does work and I can see all application lo messages on logcat.
Any ideas?
Thanks

 

[B. Diddy]

I moved this to the Software Development forum for more specific traffic.