Why doesn't logcat show anything in my Android?

Maybe you have Mylyn installed?

http://code.google.com/p/android/issues/detail?id=1808

I've had this happen occasionally. Closing and re-opening Eclipse seems to fix it.

Below: Really dumb answer, but it happens!

My cat stepped on the space button while I was away and [SPACE]xN was typed in the search bar.

That resulted in an empty Log Cat. I tried restarting and wasted like 1 hour before I realized I should clear my search bar.

TLDR; CLEAR YOUR LOG CAT SEARCH BAR!

Many times when I switched to a new Android device, I do see no more logcat messages. Unfortunately, none of the above suggestions worked for me (Eclipse Photon 4.8.0).

I am now using this . It seems to work for different devices.

If you tried all of the others, and still got losing on an empty logcat. I got another simple way.

Download an old version of ADB, and try again. It might be working, at least working for me with Android 7.0 phone (vendor stopped updating).

Here is the useful link for old versions.

For OnePlus devices and Ubuntu OS:

• Install Wine on Ubuntu

• Install ADB tools on Ubuntu

   sudo apt-get install android-tools-adb
  

• Now, attach your device to PC with USB.

• Open mounted "One Plus Drivers". A disc like icon

• Right click on OnePlus_USB_Drivers_setup.exe and run with Wine

• Then open the terminal in the present drive where your "OnePlus_USB_Drivers_setup.exe" and other driver files exists. And run

   ./adb_config_Linux_OSX.sh or sh adb_config_Linux_OSX.sh
  

• Close this terminal

• Open a new terminal and run

   adb server-start
  

Your OnePlus device should prompt you to recognise your PC as a debugging agent.

Now, run on the terminal. It should show your device.

adb devices

Reference: [SOLVED] Android Studio does not recognise my One Plus Two in Linux