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Documentazione di Ubuntu » Guida Ubuntu Desktop » Hardware › Problemi » Power problems »
Documentazione di Ubuntu » Guida Ubuntu Desktop » Hardware › Problemi » Screen problems »

# Why won't my computer turn back on after I suspended it?

If you suspend or hibernate your computer, then try to resume it or turn it back on, you may find that it does not work as you expected. This could be because suspend and hibernate aren't supported properly by your hardware.

## My computer is suspended and isn't resuming

If you suspend your computer and then press a key or click the mouse, it should wake up and display a screen asking for your password. If this doesn't happen, try pressing the power button (don't hold it in, just press it once).

If this still doesn't help, make sure that your computer's monitor is switched on and try pressing a key on the keyboard again.

As a last resort, turn off the computer by holding in the power button for 5-10 seconds, although you will lose any unsaved work by doing this. You should then be able to turn on the computer again.

If this happens every time you suspend your computer, the suspend feature may not work with your hardware.

If your computer loses power and doesn't have an alternative power supply (such as a working battery), it will switch off.

## None of my applications/documents are open when I turn on the computer again

If you hibernated your computer and switched it on again, but none of your documents or applications are open, it probably failed to hibernate properly. Sometimes this happens because of a minor problem, and the computer will be able to hibernate properly the next time you do it. It might also happen because you had installed a software update which required the computer to be restarted; in this case, the computer may have shut down instead of hibernating.

It is also possible that the computer is not capable of hibernating because the hardware doesn't support it properly. This might be because of a problem with Linux drivers for your hardware, for example. You can test this by hibernating again and seeing if it works the second time. If it doesn't, it is probably a problem with your computer's drivers.

## My wireless connection (or other hardware) doesn't work when I wake up my computer

If you suspend your computer and then resume it again, you may find that your internet connection, mouse, or some other device doesn't work properly. This could be because the device's driver doesn't properly support suspend or hibernate. This is a problem with the driver and not the device itself.

If the device has a power switch, try turning it off and then on again. In most cases, the device will start working again. If it connects via a USB cable or similar, unplug the device and then plug it in again and see if it works.

If you cannot turn off/unplug the device, or if this does not work, you may need to restart your computer for the device to start working again.

## More Information

- Power problems — Troubleshoot problems with power and batteries.
- Screen problems — Troubleshoot screen and graphics problems.

## Confronta anche

- How do I hibernate my computer? — Hibernate is disabled by default since it's not well supported.
- I have no wireless network when I wake up my computer — Some wireless devices have problems handling when your computer is suspended and doesn't resume properly.
- Why does my computer turn off when I close the lid? — Laptops go to sleep when you close the lid, in order to save power.