| 1 | <?xml version='1.0' encoding='UTF-8'?>
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| 2 | <!DOCTYPE topic PUBLIC "-//OASIS//DTD DITA Topic//EN" "topic.dtd">
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| 3 | <topic xml:lang="en-us" id="hostpowertweaks">
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| 4 | <title>Handling of Host Power Management Events</title>
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| 5 |
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| 6 | <body>
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| 7 | <p>Some host power management events are handled by <ph conkeyref="vbox-conkeyref-phrases/product-name"/>. The
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| 8 | actual behavior depends on the platform: </p>
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| 9 | <ul>
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| 10 | <li>
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| 11 | <p><b outputclass="bold">Host Suspends.</b> This event is generated when the host is about
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| 12 | to suspend, that is, the host saves the state to some nonvolatile storage and powers off. </p>
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| 13 | <p>
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| 14 | This event is currently only handled on Windows hosts and Mac
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| 15 | OS X hosts. When this event is generated, <ph conkeyref="vbox-conkeyref-phrases/product-name"/> will
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| 16 | pause all running VMs.
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| 17 | </p>
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| 18 | </li>
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| 19 | <li>
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| 20 | <p><b outputclass="bold">Host Resumes.</b> This event is
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| 21 | generated when the host woke up from the suspended state.
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| 22 | </p>
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| 23 | <p>This event is currently only handled on Windows hosts and Mac OS X hosts. When this event is generated, <ph
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| 24 | conkeyref="vbox-conkeyref-phrases/product-name"/> will resume all VMs which are where paused before. </p>
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| 25 | </li>
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| 26 | <li>
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| 27 | <p><b outputclass="bold">Battery Low.</b> The battery
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| 28 | level reached a critical level, usually less than 5 percent
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| 29 | charged.
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| 30 | </p>
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| 31 | <p>This event is currently only handled on Windows hosts and Mac OS X hosts. When this event is generated, <ph
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| 32 | conkeyref="vbox-conkeyref-phrases/product-name"/> will save the state and terminate all VMs in preparation
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| 33 | of a potential host powerdown. </p>
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| 34 | <p>The behavior can be configured. By executing the following command, no VM is saved: </p>
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| 35 | <pre xml:space="preserve">$ VBoxManage setextradata global "VBoxInternal2/SavestateOnBatteryLow" 0</pre>
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| 36 | <p>This is a global setting as well as a per-VM setting. The per-VM value has higher precedence than the global
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| 37 | value. The following command will save the state of all VMs but will not save the state of VM "foo": </p>
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| 38 | <pre xml:space="preserve">$ VBoxManage setextradata global "VBoxInternal2/SavestateOnBatteryLow" 1
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| 39 | $ VBoxManage setextradata "foo" "VBoxInternal2/SavestateOnBatteryLow" 0</pre>
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| 40 | <p>The first line is actually not required as by default the savestate action is performed. </p>
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| 41 | </li>
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| 42 | </ul>
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| 43 | </body>
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| 44 |
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| 45 | </topic>
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