yes, this all looks like the respective desktops need to bind the key to
some more or less smart program which either ejects unconditionally
or determines the tray state and sends the appropriate command to load
or eject it.
eject -T /dev/sr0
should be a smart toggler between open and closed, if not udev or other
annoyances interfere and contradict your will.
Option -t is supposed to close the tray unconditionally.
Have a nice day :)
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optical drive doesn't open in Lubuntu 18.04
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