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macbook: mbpfan back with early ramp; SMC idles fan at 79C

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Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>
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rope 2026-08-09 09:18:06 +01:00
parent c385cd3713
commit 789c5115b4
1 changed files with 12 additions and 3 deletions
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hosts/FredOS-Macbook.nix
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@ -32,9 +32,18 @@
services.tlp.enable = false; services.tlp.enable = false;
services.power-profiles-daemon.enable = true; services.power-profiles-daemon.enable = true;
# No mbpfan: measured 5813 of 6500 RPM at idle, so the SMC firmware is # The SMC holds the fan at its 1200 RPM floor while the package sits at
# already ramping hard on its own. A more aggressive curve has nothing # 79C — measured 1210 RPM at settled idle. (An earlier 5813 RPM reading
# left to give — the cooling path itself is the limit. # was a rebuild spinning down, not the steady state.) Nothing in-tree
# ramps applesmc, so drive it directly and start well before 79C.
services.mbpfan = {
enable = true;
settings.general = {
low_temp = 55; # below this, coast at minimum
high_temp = 65; # start climbing here
max_temp = 80; # full tilt — the old ceiling was above idle temp
};
};
# Haswell's own thermal management: throttle gradually via RAPL/P-states # Haswell's own thermal management: throttle gradually via RAPL/P-states
# instead of waiting for the hardware's PROCHOT emergency brake. # instead of waiting for the hardware's PROCHOT emergency brake.