Lenovo IdeaPad Slim 5 Gen 9 AMD Ryzen 7 8745HS Sleep Wake Issue Fix Windows 11

Your Lenovo IdeaPad Slim 5 Gen 9 AMD Ryzen 7 8745HS does not wake from sleep when you press a key or open the lid – the screen stays black and you must hold the power button to force restart. AMD Modern Standby implementation or Lenovo Vantage sleep mode settings cause the sleep-wake issue on the IdeaPad Slim 5 Gen 9.

This guide covers Lenovo Vantage sleep mode configuration, AMD driver updates, and power management settings to resolve sleep wake issues on the Lenovo IdeaPad Slim 5 Gen 9 AMD in Windows 11.

“IdeaPad Slim 5 Gen 9 would not wake from sleep. Had to force restart every time. AMD chipset driver update from Lenovo Vantage and disabling fast startup fixed the sleep problem completely.” – Norhaslinda, account executive from Kuantan

Why Sleep Wake Fails on Lenovo IdeaPad Slim 5 Gen 9 AMD

The AMD Ryzen 7 8745HS uses Modern Standby (S0 sleep) which keeps the processor in a low-power active state rather than fully powered off. This enables instant wake and background notifications but has more complex power state transitions than traditional S3 sleep. Certain AMD chipset driver versions and Windows 11 power configuration combinations cause the Modern Standby wake path to fail, leaving the display and keyboard unresponsive despite the system technically being running.

• AMD Modern Standby (S0) wake path failure causing display not to turn on after wake trigger
• Fast startup combining hibernation with sleep causing boot path confusion on wake
• AMD chipset driver outdated with S0 wake path bugs present in older versions
• USB device or Bluetooth sending spurious wake signals causing repeated sleep-wake cycles

Fix 1 – Update AMD Chipset Driver via Lenovo Vantage

Open Lenovo Vantage and go to System Update. Install any AMD Chipset or AMD AGESA driver updates available. AMD releases AGESA firmware and chipset driver updates that fix specific Modern Standby wake path issues on Ryzen 8000 series platforms. Updated chipset drivers correct the wake signal routing that causes the display to remain off after keyboard or lid wake triggers on the IdeaPad Slim 5 Gen 9.

Fix 2 – Disable Fast Startup

Open Control Panel – Power Options – Choose what the power button does. Click Change settings that are currently unavailable. Uncheck Turn on fast startup. Click Save changes. Fast startup causes Windows to write a partial hibernation file on shutdown and merge with regular sleep. This hybrid approach can interfere with AMD Modern Standby on the Ryzen 7 8745HS platform, causing the wake failure symptom. Disabling fast startup forces complete shutdown and normal cold boot, while sleep continues to work through the standard Modern Standby path.

Check Sleep State in BIOS

Restart the IdeaPad Slim 5 Gen 9 and press F2 for BIOS. Go to Power or Configuration – Sleep State or Standby Mode. If an S3 option is available, switch from S0 (Modern Standby) to S3 (Traditional Sleep). S3 fully powers down more subsystems during sleep, using more battery but providing more reliable wake behavior on platforms where S0 Modern Standby has driver compatibility issues. Some Lenovo BIOS versions hide this option.

Fix 3 – Identify Wake Sources

Open Command Prompt as administrator and run: powercfg /lastwake to see what caused the last wake event. Also run powercfg /waketimers to see scheduled tasks that can wake the system. If the Lenovo IdeaPad Slim 5 Gen 9 wakes randomly during sleep, a USB device or network adapter is typically the cause. In Device Manager, find each USB hub and WiFi adapter – Properties – Power Management – uncheck Allow this device to wake the computer to prevent spurious wake signals.

Fix 4 – Reinstall AMD Graphics Driver

Download AMD Cleanup Utility and run in Safe Mode to remove all AMD drivers. Restart normally. Install fresh AMD Radeon 890M driver from Lenovo Vantage or Lenovo Support. A corrupted AMD display driver is a less common but documented cause of sleep wake failure where the display controller does not re-initialize correctly after Modern Standby exit. Clean AMD driver reinstallation clears any display driver state corruption causing the blank screen on wake.

Frequently Asked Questions

Why does Lenovo IdeaPad Slim 5 Gen 9 not wake from sleep?

AMD Modern Standby wake path failure or fast startup conflict. Update AMD chipset driver via Lenovo Vantage and disable fast startup in Power Options.

How do I fix sleep issues on Lenovo IdeaPad Slim 5 Gen 9 AMD?

Update AMD chipset driver, disable fast startup, check BIOS for S3 sleep option, and identify wake sources with powercfg /lastwake command.

Does Lenovo IdeaPad Slim 5 Gen 9 AMD support S3 sleep?

Depends on BIOS version. Check BIOS – Power – Sleep State. S3 Traditional Sleep available on some firmware versions for more reliable wake behavior.

Why does Lenovo IdeaPad Slim 5 Gen 9 wake up randomly?

USB device or network adapter sending wake signal. Run powercfg /waketimers and disable Allow this device to wake the computer in Device Manager for each USB hub and WiFi adapter.

Conclusion

Lenovo IdeaPad Slim 5 Gen 9 AMD Ryzen 7 8745HS sleep wake issues in Windows 11 are resolved by updating the AMD chipset driver via Lenovo Vantage and disabling fast startup in Power Options. Checking BIOS for an S3 Traditional Sleep option provides an alternative to AMD Modern Standby for users with persistent wake failures. Random wake sources are identified with powercfg /lastwake and disabled in Device Manager to prevent spurious sleep interruptions on the IdeaPad Slim 5 Gen 9.