adb logcat hangs with “waiting for device” message

Question

When I type adb devices command on terminal, it shows device is connected

List of devices attached

0123456789ABCDEF

Answer 1

I am not pretty much sure if this works for you but can you please try the steps below:

# Kill and restart      
$ adb kill-server      
$ adb start-server     
 daemon not running. starting it now *      
 daemon started successfully *         

# Device appears, but is listed as offline

$ adb devices      
$ adb logcat

Answer 2

I have also experienced similar problems I think I solved it by having the USB debugging option switched on within Developer Options in Settings.

REPEAT The following steps above, it should work!

Answer 3

Here is yet another potential method to solve this -- in the past, the above solutions will work, but in my case, this time, this was the thing that fixed it:

1. Plug device into USB
2. Settings -> Developer Options
3. Revoke USB Debugging Authorization
4. Unplug Device
5. Repeat Step 1
6. Authorize Device
7. Repeat Steps 4&5

adb devices should now show device

adb logcat should now output logs from device