Using Lubuntu 18.04 Bionic 32 bits.
The GPU is using vesa driver and USB keyboard.
Holding an keyboard key in few seconds is “automatically” unholded.
Using CPU power profile powersaver the issue happen in few seconds and selecting ondemand or performance are long time to unhold keys.
Only happen when using emulators. Not problems with text editors.
Another detail cpu resource is 25 % when using emulator.
Thanks for read.