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I have an embedded battery powered device running Ubuntu and want to reduce power consumption. The idea is that if a user does not use a device for ca. 30 min. then the device will automatically shutdown or hibernate.

Is it possible to automatically shut down or hibernate Ubuntu after spending x minutes in suspend?

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What do you mean by "stand-by", no user input ? – João Pinto Feb 4 '11 at 15:56
I think he means suspend. – Umang Feb 4 '11 at 15:59

Suspend is an hardware managed state, such function if available would need to be implemented at the BIOS level, or at least would require BIOS support.

Unless your BIOS provides such programmable function, no, it is not possible.

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My BIOS supports this functionality. – tommyk Feb 7 '11 at 7:35

You can try gshutdown Install gshutdown from the Software Center.

If the default options are not working, try changing from Edit>Preferences>Actions the "autodetect" option to "custom command", press "Turn of the computer" and fill it with the shutdown -h now command.

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I am not looking for shutdown-timer-like tool. Is gshutdown able to recognize that system is in a suspend mode? – tommyk Feb 5 '11 at 7:10
@tommyk I don't know if this program is able to recognize the computers state. – koukourikos Feb 5 '11 at 12:03

The installation here : works well (gshutdown_0.2-1_i386.deb)

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