Keyboard issues with Android Studio on Ubuntu

This is a known issue with:

The bug seems to be triggered by some missing synchronization between IBus (the server) and Xlib + AWT (the client JVM), exposed by a combination of a quick succession of key presses and the client’s slower event handling.

The 2 workarounds that helped me were:

Workaround #1: Force ibus in synchronous mode

$ IBUS_ENABLE_SYNC_MODE=1 ibus-daemon -xrd

Do this preferably before starting Studio. This workaround was suggested in https://code.google.com/p/ibus/issues/detail?id=1733 for a different Java application facing the same problems.

Workaround #2: Disable IBus input in Studio

$ XMODIFIERS= ./bin/studio.sh

This will only disable input methods for Studio, not the other applications. Restarting the daemon while Studio is running (‘ibus-daemon -rd’) effectively disables the input methods for all other applications, and can also crash Studio's JVM with a segmentation fault.

File -> Invalidate Catches / Restart works for me.