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Reboot after shutdown?
Authored by: axello on Oct 11, '05 03:39:49PM
This is a tricky and interesting problem. I also thought about the 'Restart automatically' feature at first. However, I see problems in any implementation:

1a) UPS shuts down Mac and starts up computer through its USB interface. Unfortunately Apple in its infinite wisdom decided to remove the startup button functionality from the USB bus in the models from the past couple of years.
1b) UPS shuts down Mac, and just before the last shutdown item from Apple which hopefully triggers the nvram clock chip (or whichever chip causes the auto-startup), a specially written shutdown program halts the system horribly. Think system freeze. Then, when the power finally fails, the system isn't damaged, the HD is already nicely parked and the computer is shut off.
The autostart feature would work automagically when power is restored. And the normal manual shutdown would also still work.
Problem: when the power goes up again before the power fails completely, the computer is still in the frozen state and is utterly useless. The UPS should detect this and handle accordingly: kill the power mercilessly and restore power after a while (...)

Can anyone think of clean solutions?

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Reboot after shutdown?
Authored by: mike666 on Oct 11, '05 08:59:45PM

The only thing I can think of is a solenoid with a circuit that triggers it once and only when its power source goes from 0 to 110V. You could rig a strap to go around your machine and keep it placed over your power button. If you had a Cube or an older ADC display you could use a similar circuit with an infrared LED or something which would trigger the touch switch. These are all I can think of that wouldn't void your warranty...



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