foruna12 Posted December 19, 2022 Share Posted December 19, 2022 Hello, everyone! I have a Lenovo ThinkPad P15 Gen1 laptop: Processor: Core i7 10750H Graphics Card: UHD Graphics 630 and NVIDIA QUADRO T1000 SSD: 512GB Sound card: Realtek ALC257 Display: 1920*1080 I built the OpenCore bootloader ran sound, video, WiFi and everything is OK! But there are a few problems: 1. After starting macOS, the laptop screen is dark and have to close the lid of the laptop and open it, then the screen appears! The enable-backlight-registers-fix and -igfxblr properties don't help. Can you please tell me how to fix it? 2. VoodooPS2Controller.kext/Contents/PlugIns/VoodooPS2Mouse.kext doesn't work touchpad, system just won't boot... 3. HDMI and ThunDerbolt/ 3/USCB-C output display doesn't work, because it's on a discrete video card.... Help me please! config.plist Quote Link to comment https://www.insanelymac.com/forum/topic/355091-after-boot-black-screen-on-thinkpad-p15-with-intel-udh-640/ Share on other sites More sharing options...
shl628 Posted December 20, 2022 Share Posted December 20, 2022 (edited) If your Lenovo ThinkPad P15 Gen1 Laptop's internal display supports 4K UHD resolution, you should add the -igfxmpc boot arg. And, for black screen issues with CFL Framebuffer, try the igfxonln=1 boot arg. If it's still a black screen, try changing the Platform ID to 0x3E9B0000 Edited December 20, 2022 by shl628 Quote Link to comment https://www.insanelymac.com/forum/topic/355091-after-boot-black-screen-on-thinkpad-p15-with-intel-udh-640/#findComment-2799045 Share on other sites More sharing options...
Avery B Posted December 20, 2022 Share Posted December 20, 2022 I'm not sure that 3 can be solved unfortunately. I've got the same issue on my X1 Extreme, since the USB C and HDMI are all routed to the dGPU. For number 2, are you sure that it's an I2C trackpad? Do you have Windows or Linux on it to double check? Most thinkpads with the trackpoint/nub in the center of the keyboard tend to be SMBus/PS2. I'd reckon that you'd want Acidanthera's VoodooPS2 w/ PS2Trackpad and Keyboard in addition to VoodooRMI. Quote Link to comment https://www.insanelymac.com/forum/topic/355091-after-boot-black-screen-on-thinkpad-p15-with-intel-udh-640/#findComment-2799048 Share on other sites More sharing options...
Baio77 Posted December 21, 2022 Share Posted December 21, 2022 https://github.com/Baio1977/Lenovo-Thinkpad-T14- Look for some help in this repository, for me EVERYTHING works and I fixed some problems mentions about TB3 and PS2. 1 Quote Link to comment https://www.insanelymac.com/forum/topic/355091-after-boot-black-screen-on-thinkpad-p15-with-intel-udh-640/#findComment-2799093 Share on other sites More sharing options...
foruna12 Posted December 24, 2022 Author Share Posted December 24, 2022 On 12/20/2022 at 8:27 AM, shl628 said: If your Lenovo ThinkPad P15 Gen1 Laptop's internal display supports 4K UHD resolution, you should add the -igfxmpc boot arg. And, for black screen issues with CFL Framebuffer, try the igfxonln=1 boot arg. If it's still a black screen, try changing the Platform ID to 0x3E9B0000 I tried that and it didn't work. Even closing and opening the laptop lid stopped helping. My laptop FullHD MAX resolution 1920x1080 pixels. How can i fix it? Quote Link to comment https://www.insanelymac.com/forum/topic/355091-after-boot-black-screen-on-thinkpad-p15-with-intel-udh-640/#findComment-2799225 Share on other sites More sharing options...
shl628 Posted December 24, 2022 Share Posted December 24, 2022 6 hours ago, foruna12 said: I tried that and it didn't work. Even closing and opening the laptop lid stopped helping. My laptop FullHD MAX resolution 1920x1080 pixels. How can i fix it? Try replacing it with the Config.plist attached below. Modified based on Config.plist of OpenCore r0.8.7 version. config.plist.zip Quote Link to comment https://www.insanelymac.com/forum/topic/355091-after-boot-black-screen-on-thinkpad-p15-with-intel-udh-640/#findComment-2799241 Share on other sites More sharing options...
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