adb devices return error: protocol fault (no status)

Question

My ADB stopped working recently. All commands results in error: protocol fault (no status).

Follow trace.

adb devices

system/core/adb/adb.c::main         


        

Answer 1

I recently got the same error, after installing a driver for the Moto X. I previously had the ADB and Fastboot quick install. I installed the driver, saw that the Moto X still wasn't registered, so uninstalled the driver again. Ten I got this error message. I opened Task Manager, killed the ADB.exe and then in Bash hit the adb device command. All was good again.