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Framework 13 AI 300: Disabling AMD ACP sound card

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This issue became more obvious due to alsa-ucm profiles horribly
misassigning a non-existent device as the default microphone and
juggling profiles for the devices in a very weird way recently.

The first hotfix was this: https://github.com/NixOS/nixos-hardware/pull/1732

But upon more discussion it seems to be a Framework bios bug that
falsely reports an AMD ACP as exitent and wired up via ACPI.

Until this is fixed at the source, the best way foward is to just
blacklist the module.

I have tried this change now on 4 devices and and feel confident enough
about it working well for most users.

See this discussion for all the details: https://github.com/NixOS/nixos-hardware/issues/1603
This commit is contained in:
Dima 2026-01-22 22:09:46 +01:00
parent 9f7ba891ea
commit 31c3d206de
1 changed files with 10 additions and 0 deletions
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10
framework/13-inch/amd-ai-300-series/default.nix
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@ -22,5 +22,15 @@
boot.kernelPackages = lib.mkIf (lib.versionOlder pkgs.linux.version "6.15") ( boot.kernelPackages = lib.mkIf (lib.versionOlder pkgs.linux.version "6.15") (
lib.mkDefault pkgs.linuxPackages_latest lib.mkDefault pkgs.linuxPackages_latest
); );
# The framework bios wrongly reports the ACP device as wired, causing
# issues with alsa ucm, but also generally adding a phantom interface
# to the system.
#
# See discussion in https://github.com/NixOS/nixos-hardware/issues/1603
boot.blacklistedKernelModules = [
"snd_acp70"
"snd_acp_pci"
];
}; };
} }