adb shell su works but adb root does not

Question

I rooted my unlocked Galaxy S3 (SGH-T999)

Now, I\'m trying to run adb root from Windows Command Prompt, however, I\'m getting adbd cannot

Answer 1

In some developer-friendly ROMs you could just enable Root Access in Settings > Developer option > Root access. After that adb root becomes available. Unfortunately it does not work for most stock ROMs on the market.

Answer 2

I ran into this issue when trying to root the emulator, I found out it was because I was running the Nexus 5x emulator which had Google Play on it. Created a different emulator that didn't have google play and adb root will root the device for you. Hope this helps someone.