Dmesg-komennon tulosteessa on runsaasti tämänkaltaisia rivejä:
[22977.300122] atkbd.c: Unknown key pressed (translated set 2, code 0xf7 on isa0060/serio0).
[22977.300142] atkbd.c: Use 'setkeycodes e077 <keycode>' to make it known.
[22977.303850] atkbd.c: Unknown key released (translated set 2, code 0xf7 on isa0060/serio0).
[22977.303869] atkbd.c: Use 'setkeycodes e077 <keycode>' to make it known.
[22977.667650] atkbd.c: Unknown key pressed (translated set 2, code 0xf7 on isa0060/serio0).
[22977.667670] atkbd.c: Use 'setkeycodes e077 <keycode>' to make it known.
[22977.671386] atkbd.c: Unknown key released (translated set 2, code 0xf7 on isa0060/serio0).
[22977.671405] atkbd.c: Use 'setkeycodes e077 <keycode>' to make it known.
[23013.053982] atkbd.c: Unknown key pressed (translated set 2, code 0xf7 on isa0060/serio0).
[23013.054003] atkbd.c: Use 'setkeycodes e077 <keycode>' to make it known.
[23013.057400] atkbd.c: Unknown key released (translated set 2, code 0xf7 on isa0060/serio0).
[23013.057419] atkbd.c: Use 'setkeycodes e077 <keycode>' to make it known.
[23013.392017] atkbd.c: Unknown key pressed (translated set 2, code 0xf7 on isa0060/serio0).
[23013.392017] atkbd.c: Use 'setkeycodes e077 <keycode>' to make it known.
[23013.395481] atkbd.c: Unknown key released (translated set 2, code 0xf7 on isa0060/serio0).
[23013.395503] atkbd.c: Use 'setkeycodes e077 <keycode>' to make it known.
Osaako joku sanoa, mistä nämä rivit johtuvat?