allow to set restart/resume time on shutdown/suspend

[ceg]

Linux provides a simple way to schedule an restart event, for example:

rtcwake -m on -s <seconds-to-sleep>

This command avoids that rtcwake does any switching into another power
state (mode -m stays on).
The power state is thus handled by the regular installed powermanagment
tools, which is more stable especially on resume.

Just schedule the wake event, then do the regular shutdown/suspend.
Later, the real time clock will trigger the scheduled power event
and the machine comes back up.

[Matthew Paul Thomas (mpt)]

I'm not clear what you're asking for here.

Do you think that the Shut Down dialog, for example, should have an option for starting up the computer again at a specified time?

Or is this more of a schedule thing, providing settings to (for example) start up the computer every weekday at 8:55 a.m.?

[ceg (ceg)]

I don't know if daily wake events can be programmed in the hardware real time clock.

Yes, a small "+wakup again" checkbox or similar collapsible UI to enter a date would be sufficient I guess. But if it the UI could remember the last setting used this might already also allow daily (next day) wakeups.

For facility wide power saving schedules I think debian has a "shutdown-at-night" package.