# Power management

<pre class="terminal">
root@roadrunner:/sys/power# cat state
freeze standby mem
root@roadrunner:/sys/power# echo "freeze" > state
[ 1043.490000] PM: Syncing filesystems ... done.
[ 1043.510000] Freezing user space processes ... (elapsed 0.005 seconds) done.
[ 1043.520000] Freezing remaining freezable tasks ... (elapsed 0.002 seconds) done.
[ 1043.530000] Suspending console(s) (use no_console_suspend to debug)
</pre>

## Links

* [Power consumption](https://www.acmesystems.it/power_consumption)
* [Using Ultra Low Power mode 1 (ULP1) on SAMA5D2](http://www.at91.com/linux4sam/bin/view/Linux4SAM/UsingUltraLowPowerMode1)
* [Power management](https://wiki.archlinux.org/index.php/Power_management)
* [Power management/Suspend and hibernate](https://wiki.archlinux.org/index.php/Power_management/Suspend_and_hibernate)