Question:

“How can I resolve an issue where Wake-on-LAN/Wake-on-Wireless fails to function 1-2 hours after shutdown? Despite modifying power and BIOS settings, the problem persists. Could it be related to the network card’s power management or an issue with the IP address associated with the port-forwarded PC?”

Answer:

Wake-on-LAN (WOL) and Wake-on-Wireless (WOW) are incredibly useful features that allow you to remotely power on your PC through a network command. However, it can be frustrating when these features stop working after a certain period post-shutdown. If you’re encountering issues where WOL/WOW fails to function 1-2 hours after shutdown, here are some steps you can take to troubleshoot the problem.

Firstly, ensure that your network card is configured correctly for WOL/WOW. This involves checking the advanced settings in the device manager for your network adapter. Look for properties related to WOL/WOW and ensure they are enabled. Additionally, some network cards have a separate power management tab where you can allow the device to wake the computer. Make sure this option is checked.

Step 2: Inspect BIOS/UEFI Settings

Since you’ve already modified BIOS settings, revisit them and look for any power management options that could be affecting WOL/WOW. Some motherboards have specific settings for enabling WOL/WOW that go beyond the standard ‘Power On By PCI-E/PCI’ option. Ensure these are enabled.

Step 3: Check Power Supply

The power supply unit (PSU) must provide a small amount of power to the network card even when the PC is off. If the PSU is not functioning correctly or if the ‘ErP’ setting in the BIOS is enabled (which reduces power consumption when the PC is off), it could prevent WOL/WOW from working. Disable the ‘ErP’ setting if it’s enabled and consider testing with a different PSU.

Step 4: Review IP Address Configuration

For WOL/WOW to work correctly, the IP address of the target PC should be static or reserved. If you’re using port forwarding, ensure that the IP address hasn’t changed after shutdown. Some routers reassign IP addresses after a certain period of inactivity, which could disrupt the WOL/WOW functionality. Setting a static IP or reserving an IP in the router settings for your PC can resolve this issue.

Step 5: Update Network Card Drivers

Outdated or corrupted network card drivers can cause WOL/WOW to malfunction. Visit the manufacturer’s website to download and install the latest drivers for your network card.

Step 6: Test with Different Devices

If possible, test the WOL/WOW feature using a different device to send the magic packet or signal. This can help determine if the issue is with the sending device or the receiving PC.

Step 7: Disable Fast Startup

Windows Fast Startup feature can interfere with WOL/WOW as it doesn’t fully shut down the PC. Disable this feature through the Control Panel under Power Options.

Conclusion

By methodically going through these steps, you should be able to identify and resolve the issue causing WOL/WOW to fail after shutdown. If the problem persists, it may be worth consulting with the motherboard or network card manufacturer for further assistance. Remember, patience and a systematic approach are key to troubleshooting technical issues like these.