Recovery key on laptops & desktop computers

[Mjölnir]

Many laptops have a "recovery key" to either recover from a clean saved state or mark a state as clean.
With ZFS, this could easily be done via devd.conf(5) if devd(8) can detect that this key was pressed . It should not be too complicated with UFS either.

Could you think of other useful actions to be triggered by this button?

 

[T-Daemon]

Many laptops have a "recovery key" to either recover from a clean saved state or mark a state as clean.

The question is, is the "Recovery" key recognized by the system video console keyboard driver/controller in the first place.

Many multimedia or dual function keys are not recognized, the "Recovery" key could be among these.

misc/kbdscan should show.

 

[MG]

Never seen it, actually. Only a special bootpartition that installs back the original system. I usually wipe it for the space. Does the key say something on USB or something else it's connected to? It can also be dedicated wiring apart from the keyboard controller.