Herbie Murray
There are several ways to wake a computer from sleep mode without using a keyboard. On a laptop, you can open the lid, use an external non-Bluetooth device such as a mouse, or press the power button. For desktop computers, you can move the mouse, or, if the keyboard supports it, check the Allow this device to wake the computer box in the device manager.
How to wake a computer from sleep without a keyboard
| Characteristics | Values |
|---|---|
| Use of a mouse | Move the mouse to wake the computer from sleep mode |
| Power button | Press the power button to wake the computer |
| Lift the laptop lid | Applicable for laptops |
| USB Wake-Up option | Enable this option in BIOS settings |
| Hybrid sleep | Turn off hybrid sleep in the sleep menu |
| USB selective suspend setting | Disable this setting |
| Device manager | Go to the device manager, right-click on one of the keyboard options, go to power management and check the box that says "Allow this device to wake the computer" |
| Power Management tab | If not visible, the keyboard may not support this feature. Reinstall the keyboard driver to check |
| Bluetooth devices | Many laptop manufacturers do not allow Bluetooth devices to wake the computer from sleep mode. Use an external non-Bluetooth device instead |
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What You'll Learn
Check if the power management tab is unavailable
The Raspberry Pi hardware has no power management capability. It does not have a sleep or suspend mode. When the system is shut down, the software stops, and the hardware remains in its single power state, which is "on".
If you are experiencing issues with your Raspberry Pi's power supply, it is recommended to check your power supply and confirm that it meets the required specifications. You can do this by sticking a controlled load across your supply to ensure it can deliver the required number of Watts.
If you are using a Raspberry Pi with a WiFi dongle, you may experience dropouts in your internet connection due to the dongle turning itself off after an idle period. To address this issue, you can disable the WiFi dongle's power management by following these steps:
- Backup your existing interfaces file: sudo cp /etc/network/interfaces /etc/network/interfaces.backup.
- Edit the original interfaces file: sudo nano /etc/network/interfaces.
- Delete the entire contents of the file and replace them with the following:
Auto lo
Iface lo inet loopback
Iface eth0 inet dhcp
Auto wlan0
Allow-hotplug wlan0
Iface wlan0 inet dhcp
Wpa-conf /etc/wpa_supplicant/wpa_supplicant.conf
Wireless-power off
Iface default inet dhcp
Reboot your Raspberry Pi and check if the WiFi dongle's power management has been successfully disabled.
It is worth noting that some older sources suggest a different method for disabling WiFi power management, but this method may not work with newer versions of the Raspberry Pi OS.
Additionally, if you are using your Raspberry Pi as a headless server, you may encounter issues with it entering a power suspend state after a few hours of inactivity. To resolve this, you can try the following:
- Configure postfix to not use ipv6.
- Use fail2ban to blacklist SSH login attempts.
- Update the firmware on your router.
By following these steps, you can address power management-related issues on your Raspberry Pi and ensure its stable operation.
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Enable USB Wake-Up in BIOS settings
To enable USB Wake-Up in BIOS settings, follow these steps:
- Restart your computer and enter the BIOS settings menu during startup. The specific key combination to access the BIOS settings will depend on your computer's manufacturer and model. Commonly used key combinations include F1, F2, Del, or Esc.
- Once you are in the BIOS settings menu, look for the "Power" or "Power Management" section. This section may be located under a "Advanced" or "Advanced Settings" tab.
- In the "Power" or "Power Management" section, look for an option related to USB Wake-Up, such as "USB Wake Support," "USB Wake-Up," or "Allow this device to wake the computer."
- Use the arrow keys to navigate to the desired option, and then use the appropriate key to enable it. The specific key to enable the option may vary, but it is often F6 or Enter.
- After enabling USB Wake-Up, save your changes and exit the BIOS settings. This step is crucial to ensure that your settings are applied correctly. Look for an option like "Save and Exit" or "Save Changes and Restart."
It is important to note that not all BIOS versions support USB Wake-Up or WakeOnLAN functionality. If you cannot find the relevant settings or if the option is greyed out, you may need to check for BIOS updates or refer to your computer manufacturer's support resources for specific instructions or workarounds.
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Disable USB selective suspend
USB selective suspend is a Windows feature that allows the system to put USB devices in a low-power state when they are idle, while the computer itself remains in a working state. This feature helps save power, reduce thermal load and noise, and is especially useful for portable computers to conserve battery power.
However, there are some instances where disabling USB selective suspend may be necessary. For example, if Windows fails to recognize a USB device, or if you experience power-related problems or system instability. Disabling USB selective suspend can also reduce latency, which is useful if you need immediate and responsive input from your gaming device.
- Via the Device Manager: Press the Win + X hotkey and choose Device Manager. Double-click on the Universal Serial Bus controllers node. Right-click on any Generic USB Hub or USB Root Hub drivers and choose Properties. Switch to the Power Management tab and uncheck the "Allow the computer to turn off this device to save power" option. Click OK to save the changes. Repeat this process for all other USB drivers you want to disable selective suspend for.
- Via the Control Panel: Press the Win key, type Control Panel, and press Enter. Navigate to System and Security > Power Options > Change plan settings. Click the "Change advanced power settings" option. Double-click on the USB settings option and then expand the USB selective suspend setting. Choose "Disabled" for both the "On battery" and "Plugged in" options. Click Apply, then OK to save the changes.
- Via the Command Prompt: Open the Start Menu, type Command Prompt, and choose "Run as administrator." In the elevated Command Prompt window, type the following command and press Enter: powercfg /SETACVALUEINDEX SCHEME_CURRENT 2a737441-1930-4402-8d77-b2bebba308a3 48e6b7a6-50f5-4782-a5d4-53bb8f07e226 0.
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Check if the keyboard supports the feature
To check if your keyboard supports the feature to wake your computer from sleep, you must first open the Device Manager. You can do this by right-clicking on the Windows Start Menu icon and then clicking Device Manager. Alternatively, you can press Win + X to open the Power User menu and then select Device Manager.
In the Device Manager, you will see a list of categories for the devices connected to your PC. If you are having issues with your keyboard not waking your PC from sleep, click the arrow next to 'Keyboards' and then double-click each entry in turn. Next, select the Power Management tab at the top and check if the 'Allow this device to wake the computer' box is available. If you do not see this tab for a particular entry, move on to the next one.
If you cannot see the Power Management tab on any of your keyboards, it could be that your hardware does not support waking the computer from sleep, or you may not have the proper drivers installed. You can check for the latest drivers by consulting the manufacturer's website or a site that offers driver updates.
Additionally, if you are using a Bluetooth keyboard, your computer might not be receiving Bluetooth signals while it is asleep. In this case, you may need to update your Bluetooth driver or consider getting a newer Bluetooth adapter with better power management.
It is also worth noting that the ability to wake a computer from sleep by pressing a key on the keyboard is dependent on the computer's motherboard. This feature is disabled on older Intel motherboards, and the only way to wake the computer is by pressing the power button. Newer motherboards, on the other hand, typically support this feature.
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Use an external non-Bluetooth device
If you want to wake your laptop from sleep mode without using a keyboard, you can use an external non-Bluetooth device. Many laptop manufacturers will not allow a Bluetooth device to wake the computer from sleep mode because of the power consumption requirements to keep the Bluetooth radio activated.
To use an external non-Bluetooth device to wake your laptop, you can try the following methods:
- Use a USB keyboard or mouse: Some laptops may allow you to wake them from sleep mode by using a USB keyboard or mouse. You can connect a USB keyboard or mouse to your laptop and then try pressing any key on the keyboard or moving the mouse to see if it wakes up the laptop.
- Use an external monitor: If you have an external monitor connected to your laptop, you can try moving the mouse or pressing any key on the keyboard to wake the system.
- Use a LAN connection: If you have a wired network connection, you can try waking your laptop from sleep mode by sending a magic packet to the computer's MAC address.
- Use a power button: If your laptop has a physical power button, you can try pressing it to wake the laptop from sleep mode.
It's important to note that not all external non-Bluetooth devices may work to wake your laptop from sleep mode. The specific methods and devices that work may vary depending on your laptop's manufacturer and model, as well as your operating system and power settings.
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Frequently asked questions
You can move the mouse to wake up your computer from sleep mode. If this does not work, check your USB settings and disable USB selective suspend.
You can also try to wake up your computer by pressing the power button.
Your keyboard may be connected via Bluetooth, and your computer may be in a deeper level of sleep.
You can try to enable the USB Wake-Up option in your BIOS settings.
If your keyboard supports the feature, you will see the Power Management tab.
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