AMD GPU: Difference between revisions

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This guide is about setting up NixOS to correctly use your ~~Amd~~ Graphics card if it is relatively new (aka, after the GCN architecture).

This guide is about setting up NixOS to correctly use your AMD Graphics card if it is relatively new (aka, after the GCN architecture).

== Make the kernel use the correct driver early ==

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== Enable Southern Islands (SI) and Sea Islands (CIK) support ==

The ~~linux package enables~~ AMDGPU ~~support~~ [https://en.wikipedia.org/wiki/Radeon_HD_7000_series Southern ~~Island~~ (si)] and [https://en.wikipedia.org/wiki/Radeon_HD_8000_series Sea ~~Island~~(~~cik~~)]. ~~You~~ can set kernel ~~params to enable support~~

The oldest architectures that AMDGPU supports are [https://en.wikipedia.org/wiki/Radeon_HD_7000_series Southern Islands (SI, ie. GCN 1)] and [https://en.wikipedia.org/wiki/Radeon_HD_8000_series Sea Islands (CIK, ie. GCN 2)], but support for them is disabled by default. To use AMDGPU instead of the radeon driver, you can set the kernel parameters:

# for Southern Islands (SI) cards

# for Southern Islands (SI ie. GCN 1) cards

boot.kernelParams = [ "radeon.si_support=0" "amdgpu.si_support=1" ];

# for Sea Islands (CIK) cards

# for Sea Islands (CIK ie. GCN 2) cards

boot.kernelParams = [ "radeon.cik_support=0" "amdgpu.cik_support=1" ];

</syntaxhighlight>

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</syntaxhighlight>

You should also install the clinfo package to verify that ~~Open CL~~ is correctly setup (or check in the program you use to see if it is now available, such as in Darktable).

You should also install the clinfo package to verify that OpenCL is correctly setup (or check in the program you use to see if it is now available, such as in Darktable).

== Vulkan ==

@@ Line 1: / Line 1: @@
-This guide is about setting up NixOS to correctly use your Amd Graphics card if it is relatively new (aka, after the GCN architecture).
+This guide is about setting up NixOS to correctly use your AMD Graphics card if it is relatively new (aka, after the GCN architecture).
 == Make the kernel use the correct driver early ==
@@ Line 20: / Line 20: @@
 == Enable Southern Islands (SI) and Sea Islands (CIK) support ==
-The linux package enables AMDGPU support [https://en.wikipedia.org/wiki/Radeon_HD_7000_series Southern Island (si)] and [https://en.wikipedia.org/wiki/Radeon_HD_8000_series Sea Island(cik)]. You can set kernel params to enable support
+The oldest architectures that AMDGPU supports are [https://en.wikipedia.org/wiki/Radeon_HD_7000_series Southern Islands (SI, ie. GCN 1)] and [https://en.wikipedia.org/wiki/Radeon_HD_8000_series Sea Islands (CIK, ie. GCN 2)], but support for them is disabled by default. To use AMDGPU instead of the radeon driver, you can set the kernel parameters:
 <syntaxhighlight lang="nix">
-# for Southern Islands (SI) cards
+# for Southern Islands (SI ie. GCN 1) cards
 boot.kernelParams = [ "radeon.si_support=0" "amdgpu.si_support=1" ];
-# for Sea Islands (CIK) cards
+# for Sea Islands (CIK ie. GCN 2) cards
 boot.kernelParams = [ "radeon.cik_support=0" "amdgpu.cik_support=1" ];
 </syntaxhighlight>
@@ Line 38: / Line 38: @@
 </syntaxhighlight>
-You should also install the clinfo package to verify that Open CL is correctly setup (or check in the program you use to see if it is now available, such as in Darktable).
+You should also install the clinfo package to verify that OpenCL is correctly setup (or check in the program you use to see if it is now available, such as in Darktable).
 == Vulkan ==