ADB not responding. You can wait more,or kill “adb.exe” process manually and click 'Restart'

Question

I have installed Android Studio. Then I have updated the Android SDK. Now when I start Android Studio, this message pops up:

ADB not responding. You c

Answer 1

On my macbook pro, i was occasionally getting this in Android Studio. The following resolved it for me:

Open up a Terminal and, instead of using 'adb kill-server', use this:

$ killall adb

wait a minute and it looks like Android Studio automatically restarts adb on it's own.

Answer 2

there seems to be about a million reasons this bug happens, but for me (running on ubuntu), it was openvpn running in the background that caused it.

I killed the openvpn service and no more issues.