Lenovo s340 & s540 Big Sur OpenCore

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SYSTEM

Processor:	Intel Core i5-8265U (Whiskey Lake)
Memory:	4GB Soldered + 4gb
Graphics:	Integrated Intel UHD Graphics 620
Wireless Network:	Broadcom BCM94322
Audio:	Realtek ALC257
Camera:	Inbuilt

Tested on bigsur stable 11.4

For automatic updates use "SecureBootModel=Disabled" in the config.plist

What's working:

• Wi-Fi/Bluetooth (Broadcom BCM94322) ✅
• USB Ports, USB-C ✅
• Keyboard ✅
• Trackpad, gestures. ✅
• Audio, Headphones ✅
• Internal graphics with fill acceleration. ✅
• Control brightness, sound and touchpad via keyboard keys ✅
• Sleep ✅
• Sleep and Wake with Lid Open and Close ✅
• Battery Status ✅
• Inbuilt Camera ✅
• CPU & Fan Control ✅
• Handoff ✅
• HIDPI (Make use of one key hidpi with instruction) ✅
• If suddenly the headphones sound does not work after waking up, click. ✅

What's Not Working:

• Card reader. ‼️ (Fixed) ✅
• HDMI ‼️ (Fixed, like clockwork) ✅

SCEENSHOTS:

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