Lenovo IdeaPad Slim 5 Gen 9 AMD Ryzen 5 8645HS Sleep Not Waking Fix

The Lenovo IdeaPad Slim 5 Gen 9 is a compact and efficient laptop powered by the AMD Ryzen 5 8645HS processor. Some users find that after closing the lid or leaving the laptop idle, it enters sleep but fails to wake correctly — the screen stays dark, the keyboard is unresponsive, and a hard power-off becomes necessary.

This guide covers the most effective solutions for sleep and wake failures on the Lenovo IdeaPad Slim 5 Gen 9.

Why the Laptop Fails to Wake from Sleep

• Outdated AMD chipset or graphics driver with sleep state bugs
• Modern Standby (S0 Low Power Idle) conflicting with device drivers
• BIOS setting for sleep state set to an incompatible mode
• USB or Bluetooth device preventing proper sleep or wake
• Hibernation file corruption

Step-by-Step Fixes

Fix 1: Update AMD Chipset and Graphics Drivers

AMD sleep state issues are frequently fixed in driver updates:

1. Visit the AMD support website and download the latest AMD Chipset driver for Ryzen 8000 series processors.
2. Also download and install the latest AMD Radeon graphics driver.
3. Run both installers and restart the laptop.
4. Test sleep by closing the lid and opening it after a few minutes.

Fix 2: Update the BIOS via Lenovo Vantage

Lenovo releases BIOS updates that address sleep compatibility with AMD platforms:

1. Open Lenovo Vantage and go to Device > My Device Settings > System Update.
2. Install any available BIOS update.
3. The laptop will restart automatically to apply the update.

Fix 3: Switch the Sleep State in Registry

Modern Standby (S0) can cause wake failures on some AMD systems. Reverting to traditional S3 sleep may resolve the issue:

1. Press Win + R, type regedit, and navigate to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Power.
2. Find or create a DWORD value named PlatformAoAcOverride and set it to 0.
3. Restart the laptop and test sleep behavior.
4. Note: This may disable some Connected Standby features such as background email sync.

“Setting PlatformAoAcOverride to 0 in the registry made my IdeaPad Slim 5 wake reliably every time. Before that I had to hold the power button after every sleep session.”
— Amirul Haziq, data analyst

Fix 4: Disable Fast Startup

Fast Startup can interfere with sleep and wake cycles by mixing hibernation and shutdown states:

1. Open Control Panel > Power Options > Choose what the power buttons do.
2. Click Change settings that are currently unavailable.
3. Uncheck Turn on fast startup.
4. Click Save changes and test sleep.

Fix 5: Disconnect USB Devices Before Sleep

A connected USB device with an active driver can prevent proper sleep entry or wake. Disconnect all USB peripherals and test sleep. If sleep works without them, identify the problem device by reconnecting one at a time.

Frequently Asked Questions