Comment 3 for bug 1789164

I press e and edit the boot command, then there is an instant reaction to the keyboard on all monitors, only the indicator in the main and sub-menu of grub seem to be affected.

I noticed that the sequence is at the moment slightly different then to what I originally described: cursor down one time -> indicator moves to the second line on the laptop but does not react on the external monitor, cursor down a second time -> indicator moves to the third line on laptop and on the external monitor as well. The indicator only lags when the cursor keys have been pressed an odd number of times.