Disable Fast Startup and PCIe Power Saving to Fix Laptop Black Screen Wake-Up Failure

Conclusion#

If a Windows laptop experiences a black screen and fails to wake up after being locked, first try disabling “Fast Startup” and “PCIe Link State Power Management”. Current tests show this can restore normal operation.

When to Use This#

The screen fails to light up again after being locked or put into standby.
The keyboard and mouse may still respond, but the only option is to force a restart.
Inconsistent hibernation or wake-up anomalies occur on Windows laptops.
You want to troubleshoot the issue starting with system power settings, without immediately reinstalling Windows or sending it for repair.

Steps#

1. Disable Windows Fast Startup#

Fast Startup preserves some system states to speed up the next boot, but it can sometimes interfere with hibernation, shutdown, and hardware reinitialization.

Press Win + R, type control to open the Control Panel.
Change “View by” to “Large icons”.
Go to “Power Options”.
Click “Choose what the power buttons do”.
Click “Change settings that are currently unavailable”.
Uncheck “Turn on fast startup (recommended)”.
Save changes and restart. This setting is usually the first troubleshooting item. If the problem stems from the shutdown state or incomplete driver reloading, disabling it may improve wake-up failures.

2. Disable PCIe Link State Power Management#

PCIe Link State Power Management reduces power consumption for graphics cards or other PCIe devices, but some hardware may not be able to recover normally from deep power-saving states.

Go to “Power Options” in the Control Panel.
Next to your currently selected power plan, click “Change plan settings”.
Click “Change advanced power settings”.
Expand “PCI Express”.
Expand “Link State Power Management”.
Set the configuration to “Off”.
Click “Apply” and confirm. If your laptop has separate options for “On battery” and “Plugged in”, it’s recommended to set both to “Off” first, then observe if the black screen issue still occurs.

Additional Notes#

Disabling PCIe power saving might slightly increase power consumption. Once the issue is resolved, you can test disabling it only for “Plugged in” mode.
Always restart after modifying settings to prevent old power states from being retained.
If the problem persists, the next step should be to check graphics card drivers, BIOS, and Windows updates. Do not rely on forced shutdowns indefinitely.

Commands / Examples Summary#

Click to expand

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開啟控制台：
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Win + R
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輸入：control
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快速啟動：
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控制台
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→ 電源選項
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→ 選擇按下電源按鈕時的行為
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→ 變更目前無法使用的設定
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→ 取消「開啟快速啟動」
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PCIe 電源管理：
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控制台
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→ 電源選項
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→ 變更計畫設定
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→ 變更進階電源設定
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→ PCI Express
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→ 連結狀態電源管理
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→ 關閉

Conclusion#

First disabling Fast Startup, then deactivating PCIe Link State Power Management, is the lowest-cost approach to troubleshoot Windows locked black screen issues. If it’s still ineffective, then investigate drivers and BIOS; don’t struggle with the black screen all night.