- Joined
- Jan 1, 2022
- Messages
- 18
Hello!
I have been struggling with this since 2014, and although this old laptop is no longer my main computer, I never figured out why it doesn't work while it SHOULD, and it's driving me nuts. =(
Model: Lenovo Thinkpad E420
Motherboard: 1141BTF
CPU: Intel Core i3-2540m (Sandy Bridge - 2nd Gen) 1366x768
Graphics: Intel HD 3000 Graphics (6-series)
RAM: 2 x 4 GB
OS: High Sierra (Same problem since... Mavericks? Lol. I started with Chimera at the time, then Clover, then OpenCore as of now)
OpenCore 0.6.4-DEBUG
SMBIOS: MacbookPro8,1
boot-args -v keepsyms=1 debug=0x100 alcid=1
macOS is bootable with device-id <00000000> which disable the HD 3000 iGPU, however stuck @ 1024x768 with no QE/CI. If we remove the line, we get a black screen on boot on the internal display or any other option (Laptop has VGA and HDMI. I only care for the internal display by now lol). However, we are able to TeamViewer inside the OS and we can see that the system is functional at full resolution 1366x768 (It's glitch but not sure if it's the old laptop and/or TeamViewer on Android - Using Clover back then, TeamViewer was fluid).
Using TeamViewer, I managed to dump a log of IOREG and "System Informations" at full resolution and attached it here hoping this may help troubleshooting.
Pretty sure the solution is related to WhateverGreen framebuffer patching ( https://github.com/acidanthera/What...-hd-graphics-20003000-sandy-bridge-processors ) and/or patching bus IDs ( https://dortania.github.io/OpenCore...l-patching/busid.html#parsing-the-framebuffer ) but try as I might, I never pulled it off since years =(
Apparently, someone actually succeeded as he provided his SSDT ( https://dsdt-database.monster/thinkpad-edge-e420-opencore/ ) . No use without a functional Config.plist however huh.
Appreciate the help,
Regards
I have been struggling with this since 2014, and although this old laptop is no longer my main computer, I never figured out why it doesn't work while it SHOULD, and it's driving me nuts. =(
Model: Lenovo Thinkpad E420
Motherboard: 1141BTF
CPU: Intel Core i3-2540m (Sandy Bridge - 2nd Gen) 1366x768
Graphics: Intel HD 3000 Graphics (6-series)
RAM: 2 x 4 GB
OS: High Sierra (Same problem since... Mavericks? Lol. I started with Chimera at the time, then Clover, then OpenCore as of now)
OpenCore 0.6.4-DEBUG
SMBIOS: MacbookPro8,1
boot-args -v keepsyms=1 debug=0x100 alcid=1
macOS is bootable with device-id <00000000> which disable the HD 3000 iGPU, however stuck @ 1024x768 with no QE/CI. If we remove the line, we get a black screen on boot on the internal display or any other option (Laptop has VGA and HDMI. I only care for the internal display by now lol). However, we are able to TeamViewer inside the OS and we can see that the system is functional at full resolution 1366x768 (It's glitch but not sure if it's the old laptop and/or TeamViewer on Android - Using Clover back then, TeamViewer was fluid).
Using TeamViewer, I managed to dump a log of IOREG and "System Informations" at full resolution and attached it here hoping this may help troubleshooting.
Pretty sure the solution is related to WhateverGreen framebuffer patching ( https://github.com/acidanthera/What...-hd-graphics-20003000-sandy-bridge-processors ) and/or patching bus IDs ( https://dortania.github.io/OpenCore...l-patching/busid.html#parsing-the-framebuffer ) but try as I might, I never pulled it off since years =(
Apparently, someone actually succeeded as he provided his SSDT ( https://dsdt-database.monster/thinkpad-edge-e420-opencore/ ) . No use without a functional Config.plist however huh.
Appreciate the help,
Regards