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Problem: When using kdb via keyboard it does not react to control characters which are supported in serial mode. Example: Chords such as ctrl+a/e/d/p do not work in keyboard mode Solution: Before disregarding non-printable key characters, check if they are one of the supported control characters, I have took the control characters from the switch case upwards in this function that translates scan codes of arrow keys/backspace/home/.. to the control characters. Suggested-by: Douglas Anderson <[email protected]> Signed-off-by: Nir Lichtman <[email protected]> Reviewed-by: Douglas Anderson <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Daniel Thompson <[email protected]>