Gina Johnson
If your computer screen is flickering when you wake it from sleep mode, you're not alone. This issue has been reported by many users, especially those with Windows 10 operating systems. The problem can be caused by a variety of factors, including incompatible apps, outdated display drivers, or even hardware faults. In some cases, it may be due to specific laptop models or certain types of monitors. To troubleshoot this issue, you can try updating your display drivers, checking for incompatible apps, or, in rarer cases, reaching out to the manufacturer to determine if it's a hardware issue.
Characteristics and Values
| Characteristics | Values |
|---|---|
| Operating System | Windows 10, Windows 11 |
| Computer Manufacturer | Lenovo, Redmi, Huawei, Acer |
| Computer Model | Lenovo Yoga C940 |
| Issue | Screen flickering, black bar across the screen, computer slow down |
| Potential Causes | Incompatible apps, outdated display drivers, Hyper-V enabled |
| Potential Fixes | Update Windows, update firmware or BIOS, update graphics driver, disable Hyper-V |
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What You'll Learn
Incompatible apps or display drivers
If you're experiencing a black flicker when your computer wakes up from sleep mode, it could be due to incompatible apps or display drivers. This is a common issue faced by many computer users, and there are several troubleshooting steps you can take to try and resolve the problem.
First, let's talk about incompatible apps. When you wake your computer from sleep mode, certain apps may not function properly and cause the screen to flicker or turn black. To determine whether an app is causing the problem, open the Task Manager and check if it flickers. If you notice flickering in the Task Manager, it's likely that an incompatible or faulty app is the culprit. Try disabling any recently installed apps or those that you suspect might be causing the issue. Additionally, the App Readiness service, which prepares apps when you first log in or add new apps, has been known to cause the "black screen after sleep" problem. Disabling this service may help resolve the issue.
Now, let's discuss display drivers. Outdated, corrupted, or incompatible display drivers can often lead to a black screen when waking your computer from sleep. To fix this, you can try updating your display drivers. Here are the steps:
- Right-click the Start button on your taskbar and select Device Manager.
- Expand the "Display adapters" option, then right-click on your display device and select "Update driver."
- Follow the on-screen instructions to complete the update process.
If updating the drivers doesn't work, you might need to try reinstalling them. First, delete the existing drivers in Device Manager and restart your computer. This will prompt the system to reinstall the stock graphics drivers that came with your computer.
It's important to note that upgrading or reinstalling drivers comes with certain risks. Always ensure that the model of the upgraded driver installation file matches your hardware, as incompatible firmware can cause further issues or even freeze your computer.
In some cases, the problem may be caused by a combination of factors, such as incompatible apps and display drivers, or other system-specific configurations. If the issue persists, it is recommended to seek technical support from your computer's manufacturer or a trusted technician. They can help identify the root cause and provide tailored solutions.
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BIOS update required
If you are experiencing a black flickering screen when your computer wakes up from sleep mode, it could be due to a BIOS update interruption or a faulty GPU. BIOS (Basic Input/Output System) is a program that the microprocessor uses to start the computer. When a BIOS update is interrupted, it can result in a black screen, preventing access to data or any other operations.
To resolve this issue, you can try the following steps:
- Detach and re-attach removable batteries: Power off your system, unplug the AC adapter, and press and hold the power button for about 40 seconds to discharge any remaining current. Then, remove the battery, reattach it, and reconnect the AC adapter before turning on your system again.
- Resume the BIOS update: If the BIOS update was interrupted, you can try to resume it by following the instructions provided by the manufacturer. This may involve using specific key combinations during the boot process to access the BIOS menu and select the option to resume the update.
- Check for GPU issues: The graphical processing unit (GPU) is responsible for system graphics. A faulty GPU can cause a black screen. Remove the graphics card from the PCIe x16 slot and inspect it for defects. If it appears damaged or worn out, replace it.
- Rollback or reinstall graphics driver: In some cases, a graphics driver update can interfere with BIOS settings, leading to a black screen. To fix this, boot your system into Safe Mode and rollback the driver update by using the previous driver configurations, which should allow for a smooth startup.
Additionally, it is recommended to keep your BIOS, graphics drivers, and other system software up to date. Updates often include bug fixes and improvements that can enhance the stability and performance of your computer, reducing the likelihood of issues such as black flickering screens.
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Hyper-V issues
If you are experiencing black screen flickering issues on your Windows 10 or Windows 11 computer when waking it up from sleep or hibernation, it could be due to several reasons. One specific issue that has been reported is related to the Hyper-V feature on some laptops, particularly the Lenovo Yoga C940. Here are some details about this problem and potential solutions:
It has been reported that enabling Hyper-V on certain laptops, such as the Lenovo Yoga C940, can cause screen flickering issues when resuming from hibernation. This problem does not seem to occur when resuming from regular sleep mode, only from hibernation. The issue is not limited to a specific brand or model of laptop, as it has been observed on various machines, including those from Lenovo, Redmi, and Huawei.
When Hyper-V is enabled and the laptop resumes from hibernation, the screen starts flickering, and the event log fills up with EventID 15 messages indicating that "The iommu has detected an error." This issue seems to be specific to the internal screen of the laptop and does not occur on external screens.
To troubleshoot this problem, you can try the following steps:
- Disable Hyper-V: The simplest solution is to disable Hyper-V in your system settings. This can be done by accessing the "Turn Windows features on or off" dialog in the Control Panel and unchecking the "Hyper-V" option. After disabling Hyper-V, try resuming your laptop from hibernation to see if the screen flickering issue persists.
- Update Drivers and BIOS: Ensure that your laptop has the latest drivers and BIOS updates installed. Visit your laptop manufacturer's support website to download and install any available updates, especially graphics driver updates.
- Contact Manufacturer Support: If the issue persists, it is recommended to contact your laptop manufacturer's support team. For example, if you own an Acer laptop, you can reach out to Acer support for further assistance. They may provide additional troubleshooting steps or suggest specific fixes for your particular laptop model.
- Reinstall the Operating System: As a last resort, you can try reinstalling your operating system and then updating all drivers and BIOS to the latest versions. While this is a more drastic step, it has been reported to resolve the screen flickering issue for some users.
It is important to note that the specific steps to resolve the Hyper-V screen flickering issue may vary depending on your laptop's brand and model. Always ensure that your system is up to date with the latest drivers and updates, as this can often resolve compatibility issues and improve system stability.
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Faulty monitor
If your computer wakes up from sleep mode with a black flickering screen, there could be a number of issues at play. Firstly, it is important to determine whether the problem lies with the computer's hardware or software. In some cases, a faulty monitor can be the culprit.
To rule out a faulty monitor, you can try connecting the computer to a different monitor or screen and see if the issue persists. If the black flickering only occurs on one specific monitor, then it is likely that the monitor is faulty and may need to be repaired or replaced.
Additionally, outdated or corrupted graphics drivers can cause issues with sleep mode and screen display. It is recommended to update your graphics drivers to the latest version and check if that resolves the problem. You can usually find and install driver updates through the manufacturer's website or your device's built-in update utility.
Another potential cause could be incompatible or outdated applications. Certain applications may not be optimized for your operating system or hardware, leading to conflicts and display issues when resuming from sleep mode. Try updating or reinstalling any recently installed applications to ensure compatibility.
In some cases, the issue may lie with the operating system itself. For example, some users have reported that upgrading to Windows 11 or a newer version of Windows 10 introduced the black flickering issue upon wake-up. In such cases, rolling back to a previous version of the operating system or waiting for an official update that addresses the problem may be necessary.
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Graphics issue
If your computer wakes up from sleep mode with a black screen that flickers, it could be due to a graphics issue. This problem has been reported by several users, and there are a few potential fixes that you can try.
One potential cause could be outdated drivers. Try updating your graphics driver to the latest version and see if that resolves the issue. You can usually find the latest drivers on the manufacturer's website. If you have an Intel graphics card, you can refer to their community page for more specific instructions.
If updating the drivers doesn't work, you might need to try reinstalling them. You can do this by deleting the existing drivers in Device Manager and then restarting your computer. This will prompt your computer to reinstall the stock graphics drivers that came with your system.
Another potential solution is to perform a Windows Update. In some cases, the issue has been resolved by updating the operating system to the latest version. This can be done by going to Settings > Update & Security > Windows Update and clicking on "Check for Updates."
Additionally, you can try testing your computer's monitor on a donor system with similar specifications to rule out any potential issues with the monitor itself.
If none of these solutions work, you may need to contact your computer or graphics card manufacturer's support team for further assistance. They may have additional troubleshooting steps or be able to identify a hardware issue.
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Frequently asked questions
Screen black flickering after waking up from sleep mode could be due to incompatible apps or outdated display drivers. To determine the cause, check if Task Manager flickers. If it does, you may need to uninstall the app or update the display driver.
You can try the following steps:
- Check for updates for your Windows operating system, firmware, and BIOS.
- Reinstall GPU drivers.
- Swap cables (DVI, HDMI, etc.).
- Try a different monitor to see if the issue is specific to your monitor or your computer.
- Disable Hyper-V (if enabled) and then resume from hibernation.
Some specific issues that can cause black flickering include:
- Incompatible apps or outdated display drivers.
- Faulty monitor.
- Graphics driver issues.
