xinput -list gives:

⎣ Virtual core keyboard                     id=3    [master keyboard (2)]
    ↳ Virtual core XTEST keyboard               id=5    [slave  keyboard (3)]
    ↳ Power Button                              id=6    [slave  keyboard (3)]
    ↳ Video Bus                                 id=7    [slave  keyboard (3)]
    ↳ Power Button                              id=8    [slave  keyboard (3)]
    ↳ Sleep Button                              id=9    [slave  keyboard (3)]
    ↳ Logitech USB Keyboard System Control      id=10   [slave  keyboard (3)]
    ↳ Logitech USB Keyboard                     id=11   [slave  keyboard (3)]
    ↳ Logitech USB Keyboard Consumer Control    id=12   [slave  keyboard (3)]
    ↳ Logitech USB Keyboard Consumer Control    id=13   [slave  keyboard (3)]

My keyboard does not have a Power/Sleep button, neither a Video Bus (?). Also, I don't understand the repeated "Consumer Control" entry and the "System Control" entry. Is there any way to disable those?

Could the Power/Sleep button be mislabelled from the CPU case?

I'm using a (USB) Logitech K120 with Debian Stretch.

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