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nixos-hardware/lenovo/thinkpad/l14/amd/default.nix
2022-12-31 11:57:44 +01:00

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Nix

{
imports = [
../.
../../../../common/cpu/amd
../../../../common/gpu/amd
];
boot.kernelParams = [
# With BIOS version 1.12 and the IOMMU enabled, the amdgpu driver
# either crashes or is not able to attach to the GPU depending on
# the kernel version. I've seen no issues with the IOMMU disabled.
#
# BIOS version 1.13 fixes the IOMMU issues, but we leave the IOMMU
# in software mode to avoid a sad experience for those people that drew
# the short straw when they bought their laptop.
#
# Do not set iommu=off, because this will cause the SD-Card reader
# driver to kernel panic.
"iommu=soft"
];
}