kahunalx Posted September 5, 2025 Share Posted September 5, 2025 Hey everyone, As you probably saw in my other posts, I've been working on a build on my Lenovo ThinkPad X1 Carbon Gen 8 (Model 20U9), I have managed to get most things running smoothly using OpenCore and Sequoia. I just noticed the integrated HDMI port on the laptop does not work. When I plug in an external monitor, there is no signal detected at all. Interestingly, video output works perfectly fine when I connect a monitor via a USB-C to DisplayPort adapter. The system detects the display, and I can use it without any issues. I'm attaching my config.plist; is there a framebuffer patch, or maybe an ACPI fix to correctly route the HDMI port that I'm missing? Any advice on what to try would be greatly appreciated! Thanks in advance for your help! config.plist Link to comment https://www.insanelymac.com/forum/topic/361639-thinkpad-x1-carbon-gen-8-20u9-hdmi-port-not-working/ Share on other sites More sharing options...
LockDown Posted September 6, 2025 Share Posted September 6, 2025 Is that the tha10th gen Link to comment https://www.insanelymac.com/forum/topic/361639-thinkpad-x1-carbon-gen-8-20u9-hdmi-port-not-working/#findComment-2840220 Share on other sites More sharing options...
kahunalx Posted September 8, 2025 Author Share Posted September 8, 2025 It is indeed. Lenovo ThinkPad X1 Carbon Gen 8 20U9 Intel Core i7-10610U (4 cores / 8 threads) 16GB DDR3 RAM WD Black SN770 1TB NVMe (replaced the original) Intel UHD Graphics Comet Lake-U GT2 (similar to an Intel UHD 630, I believe) Link to comment https://www.insanelymac.com/forum/topic/361639-thinkpad-x1-carbon-gen-8-20u9-hdmi-port-not-working/#findComment-2840357 Share on other sites More sharing options...
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