How to Fix DisplayPort doesn't wake up from sleep (Catalina)
Graphics issues usually stem from an unsupported GPU, missing acceleration patches, or incorrect boot arguments.
Quick Fix Steps
- Verify GPU support: Check if your GPU model is natively supported in your target macOS version via WhateverGreen documentation.
- Update kexts: Ensure Lilu and WhateverGreen are current and loaded before other GPU-related kexts.
- Check boot arguments: Add
-v keepsyms=1 debug=0x100for debugging, oragdpmod=pikerafor modern AMD cards. - Test Metal support: Open About This Mac > System Report > Graphics and confirm Metal is listed.
Verification
- Graphics acceleration is smooth (not CPU-bound).
- Metal is reported in System Information.
- No GPU-related kernel panics on boot.
Related Searches
Original Question: "DisplayPort doesn't wake up from sleep (Catalina)"
I've just set up a Lenovo M720Q Tiny using Dortania's Opencore guide. The system works perfectly... with one exception.
After a short sleep, the external display (via DP) will wake up along with the rest of the system when I hit the keyboard or click the mouse.
After a longer sleep (presumably it goes into a different type of sleep), the display doesn't wake up. I have to unplug and plug back in the DP connector to wake it up.
A few details:
- I'm running Catalina 10.15.4.
- Intel i5-8400T with UHD 630 iGPU.
- OpenCore 0.6.1
- Hibernatemode is set to 0.
- I've tried the boot argument igfxonln=1 but this hasn't solved the problem.
- I also tried adding a
acpi-wake-typekey to DeviceProperties - no improvement. - config.plist is at https://pastebin.com/R86vqe73 (with PlatformInfo removed)
Any hints gratefully received!
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