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boot: switch to the latest kernel for the NPU

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The in-tree amdxdna driver on LTS 6.18 is too old for FastFlowLM:
flm validate reports kernel_ok=false and the driver loads NPU firmware
1.0.0.63, while FLM needs 1.1.0.0 or newer. The 7.x driver loads
npu_7.sbin (1.1.2.64), and /dev/accel/accel0 is present on 7.2.11.

Assisted-by: Claude:opus-5-5
This commit is contained in:
Sergei Poljanski 2026-10-20 20:37:11 +04:00
commit 1be968b6b5
Signed by: asxpi
GPG key ID: 4F8851660FA4121B
1 changed files with 5 additions and 7 deletions
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12
modules/boot.nix
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@ -2,13 +2,11 @@
{ config, pkgs, lib, ... }:
{
# LTS kernel (currently 6.18.x).
# CAVEAT: this breaks FastFlowLM NPU acceleration — the in-tree amdxdna driver
# on 6.18 is too old (flm validate: kernel_ok=false, and it loads NPU firmware
# 1.0.0.63 while FLM needs >=1.1.0.0; the 7.x driver loads npu_7.sbin =
# 1.1.2.64 instead). Switch back to pkgs.linuxPackages_latest if the NPU is
# needed again, until 1.1.x amdxdna lands in an LTS series.
boot.kernelPackages = pkgs.linuxPackages;
# Latest mainline-stable kernel, not LTS: the in-tree amdxdna driver on LTS
# 6.18 is too old for FastFlowLM NPU acceleration (flm validate: kernel_ok=
# false; it loads NPU firmware 1.0.0.63 while FLM needs >=1.1.0.0, which the
# 7.x driver provides via npu_7.sbin = 1.1.2.64).
boot.kernelPackages = pkgs.linuxPackages_latest;
# amdgpu GTT (dynamically shared system RAM the iGPU can address) raised to
# 56 GiB. On kernel 6.18 `amdgpu.gttsize` is deprecated; TTM controls it in