From cc65e27670abccced5997d4a93c4c930aef6fd0b Mon Sep 17 00:00:00 2001
From: 4JX <79868816+4JX@users.noreply.github.com>
Date: Sun, 28 Jan 2024 01:25:14 +0100
Subject: [PATCH] Better default for amdgpuBusId

---
 lenovo/legion/16ach6h/README.md          | 6 ++++++
 lenovo/legion/16ach6h/hybrid/default.nix | 2 +-
 2 files changed, 7 insertions(+), 1 deletion(-)

diff --git a/lenovo/legion/16ach6h/README.md b/lenovo/legion/16ach6h/README.md
index f8c1190..19f6c24 100644
--- a/lenovo/legion/16ach6h/README.md
+++ b/lenovo/legion/16ach6h/README.md
@@ -3,6 +3,12 @@ Due to the introduction of DDG feature, you may toggle DDG frequently, so for th
 **But It will slow down NixOS evaluation by factor 2 and increase memory usage.**  
 So if you don't need specialization feature, you can just use hybrid only configuration or nvidia only (DDG only) configuration
 
+## Using multiple drives with this configuration
+
+When using more than one drive, the value of `hardware.nvidia.prime.amdgpuBusId` will change from the default of `PCI:5:0:0`.
+
+Make sure you override this default in your personal configuration. For two drives, it should be `PCI:6:0:0`.
+
 ## Setup at the time of testing
 ```
 $ nix-info -m
diff --git a/lenovo/legion/16ach6h/hybrid/default.nix b/lenovo/legion/16ach6h/hybrid/default.nix
index 6381e6a..51e10dc 100644
--- a/lenovo/legion/16ach6h/hybrid/default.nix
+++ b/lenovo/legion/16ach6h/hybrid/default.nix
@@ -28,7 +28,7 @@
       powerManagement.enable = lib.mkDefault true;
 
       prime = {
-        amdgpuBusId = "PCI:6:0:0";
+        amdgpuBusId = lib.mkDefault "PCI:5:0:0";
         nvidiaBusId = "PCI:1:0:0";
       };
     };