I experienced the same issue, regardless of the AVD. I'm too new to understand why, but it seems that Android Studio created /.android/avd
directories in two locations:post
/root/.android/avd
/home/USERNAME/.android/avd
The .avd and .ini created when creating a new AVD were stored in the 1st location, and the 2nd location was empty. To resolve it, I copied and pasted both the .avd and .ini files for each AVD from 1 to 2 (they needed to be in both in order for AS to see and run the AVD). The emulator then ran successfully.gradle
https://stackoverflow.com/questions/48996437/process-finished-with-exit-code-1-unknown-avd-nameui