pbbuttonsd 0.8.1a-2 (powerpc binary) in ubuntu xenial

 PBButtons is a program suite to handle the special hotkeys of an Apple
 iBook, Powerbook or TiBook. It handles the power button of MacMini G4.
 With this programs the keys for the display brightness, the volume of
 speaker and headphone, the mute key and the eject key will do their job
 as expected.