[ 542.997769] atkbd.c: Unknown key pressed (translated set 2, code 0xd9 on isa0060/serio0).
[ 542.997780] atkbd.c: Use 'setkeycodes e059 <keycode>' to make it known.
[ 542.999359] atkbd.c: Unknown key released (translated set 2, code 0xd9 on isa0060/serio0).
[ 542.999370] atkbd.c: Use 'setkeycodes e059 <keycode>' to make it known.
dmesg gives me the following for FN+F8:
[ 542.997769] atkbd.c: Unknown key pressed (translated set 2, code 0xd9 on isa0060/serio0).
[ 542.997780] atkbd.c: Use 'setkeycodes e059 <keycode>' to make it known.
[ 542.999359] atkbd.c: Unknown key released (translated set 2, code 0xd9 on isa0060/serio0).
[ 542.999370] atkbd.c: Use 'setkeycodes e059 <keycode>' to make it known.