It's either that or reverse engineer something. Wifi: Catalina is weird, so currently no one has firgured out what it's using to make WiFi work. The Arch Linux guide which I basically stole to make this one: TRBP T2 security chip bypass to allow access to the SSD, keyboard, and trackpad: MCMrARM Here's a list of the real heroes who made this possible: I'm not a software developer, so if there are any mistakes or better ways of doing things, I'd appreciate any suggestions. This gist is just a compilation of the hard work that others have put in. While this new patch series has the GPU switching working, there is sometimes flickering of the screen when switching the GPU, the NVIDIA GPU sometimes gets lodged in its power-saving mode, and other potential problems.This gist is out of date and I can no longer help much, as I got rid of my Mac. Lukas Wunner had started from some patches that David Airlie was hacking on three years ago but never finished. Lack of support for this in vga_switcheroo is pretty much the only obstacle to get gpu switching to work on MBPs."īack in 2012 were patches by others for working on MacBook Pro GPU switching and then revised again last year, but the full support has yet to be merged to the Linux kernel. The solution is to temporarily switch the DDC lines to the integrated gpu when reading the EDID, which the gmux is capable of. The integrated i915 gpu is therefore unable to detect the LVDS (or eDP) connector on bootup and switching to the integrated gpu will lead to a black screen. Initially the gmux is switched to the discrete gpu.
While other laptops generally have okay GPU switching support these days, Lukas explained of the MBP hardware, "On MBPs, the panel is not connected to one of the gpus, but to the gmux chip (the "handler" in vga_switcheroo speak). Independent developer Lukas Wunner has written up / revised 11 patches for enabling GPU switching on the Apple MacBook Pro via extending vga_switcheroo and the Intel/Nouveau drivers.
For those running Linux on Apple MacBook Pro laptops that have both Intel HD Graphics and a discrete NVIDIA GPU, there's new patches underway for proper GPU switching support.
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