2025_09_02

Author: randomizedcoder

desktop/l/configuration.nix

@@ -37,11 +37,17 @@
       ./grafana.nix
       # clickhouse
       ./clickhouse-service.nix
+      # GPU fan control
+      ./gpu-fan-control.nix
+      # Corsair fan control
+      ./corsair-fan-control.nix
       #./docker-compose.nix
       ./docker-daemon.nix
       #./smokeping.nix
       #./distributed-builds.nix
       #./hyprland.nix
+      ./nginx.nix
+      ./ollama-service.nix
     ];
 
   boot = {
@@ -67,6 +73,8 @@
     #   #"nomodeset"
     # ];
 
+    kernelParams = [ "acpi_enforce_resources=lax" ];
+
     initrd.kernelModules = [
       "amdgpu"
     ];

desktop/l/corsair-fan-control.nix

@@ -0,0 +1,76 @@
+#
+# Corsair Commander Fan Control Service
+#
+# This service sets the fan speed for Corsair Commander controlled fans at boot time.
+# Uses liquidctl to control the fan speed.
+#
+
+{ config, lib, pkgs, ... }:
+
+let
+  # Configuration - modify these values for your setup
+  fanNumber = "fan1";      # Change this to control different fans (fan1, fan2, fan3, etc.)
+  fanSpeed = 100;          # Change this to desired fan speed (0-100)
+
+    # Script to set fan speed using liquidctl
+  corsairFanControlScript = pkgs.writeShellScript "corsair-fan-control" ''
+    #!/bin/sh
+    set -eu
+
+    FAN_NUMBER="${fanNumber}"
+    FAN_SPEED="${toString fanSpeed}"
+
+    echo "Setting Corsair Commander ${fanNumber} speed to ${toString fanSpeed}%"
+
+    # Check if liquidctl is available
+    if ! command -v liquidctl >/dev/null 2>&1; then
+      echo "Error: liquidctl not found. Please install it first."
+      exit 1
+    fi
+
+    # Set the fan speed
+    # Note: fanSpeed is interpolated by Nix, so we use toString to convert the integer to string
+    if liquidctl --match corsair set "$FAN_NUMBER" speed "$FAN_SPEED"; then
+      echo "Fan speed set successfully to ${toString fanSpeed}%"
+      exit 0
+    else
+      echo "Failed to set fan speed"
+      exit 1
+    fi
+  '';
+
+in {
+
+  systemd.services.corsair-fan-control = {
+    description = "Set Corsair Commander fan speed at boot";
+    wantedBy = [ "multi-user.target" ];
+    after = [ "multi-user.target" "udev.service" ];
+
+    serviceConfig = {
+      Type = "oneshot";
+      ExecStart = "${corsairFanControlScript}";
+      RemainAfterExit = true;
+      StandardOutput = "journal";
+      StandardError = "journal";
+      # Run as root since liquidctl needs elevated privileges
+      User = "root";
+      Group = "root";
+    };
+  };
+
+  # Optional: Add a manual service for runtime fan control
+  systemd.user.services.corsair-fan-control-manual = {
+    description = "Manual Corsair fan control (user service)";
+    wantedBy = [ "default.target" ];
+
+    serviceConfig = {
+      Type = "oneshot";
+      ExecStart = "${corsairFanControlScript}";
+      RemainAfterExit = true;
+      StandardOutput = "journal";
+      StandardError = "journal";
+      # Note: This will need sudo privileges to work
+    };
+  };
+
+}

desktop/l/flake.lock

@@ -0,0 +1,105 @@
+#
+# GPU Fan Control Service
+#
+# This service sets the fan speed for AMD GPUs at boot time.
+# Configure the GPU bus address and desired fan speed below.
+#
+
+{ config, lib, pkgs, ... }:
+
+let
+  # Configuration - modify these values for your setup
+  gpuBus = "0000:63:00.0";  # Change this to your GPU's bus address
+
+  #[nix-shell:~]$ lspci | grep -i radeon
+  #44:00.0 Display controller: Advanced Micro Devices, Inc. [AMD/ATI] Vega 20 [Radeon Pro VII/Radeon Instinct MI50 32GB]
+  #63:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] Navi 10 [Radeon Pro W5700]
+
+  fanSpeedPercent = 50;      # Change this to desired fan speed (0-100)
+
+  # Calculate the actual PWM value based on percentage
+  fanSpeedPWM = builtins.toString (fanSpeedPercent * 255 / 100);
+
+  # Script to set fan speed
+  fanControlScript = pkgs.writeShellScript "gpu-fan-control" ''
+    #!/bin/sh
+    set -eu
+
+    BUS="${gpuBus}"
+    FAN_SPEED="${fanSpeedPWM}"
+
+    echo "Setting GPU fan speed to ${toString fanSpeedPercent}% (PWM: $FAN_SPEED) for bus $BUS"
+
+    # Find the GPU device and set fan speed
+    for dev in /sys/class/drm/card*/device; do
+      if grep -q "PCI_SLOT_NAME=$BUS" "$dev/uevent" 2>/dev/null; then
+        echo "Found GPU device at $dev"
+
+        # Find the hwmon directory
+        for hwmon in "$dev"/hwmon/hwmon*; do
+          if [ -d "$hwmon" ]; then
+            echo "Found hwmon at $hwmon"
+
+            # Check if fan control files exist
+            if [ -f "$hwmon/pwm1_enable" ] && [ -f "$hwmon/pwm1" ]; then
+              echo "Setting fan control mode to manual"
+              echo 1 > "$hwmon/pwm1_enable"
+
+              # Get max PWM value
+              max_pwm=$(cat "$hwmon/pwm1_max" 2>/dev/null || echo 255)
+              echo "Max PWM: $max_pwm"
+
+              # Calculate actual PWM value based on percentage
+              # Note: fanSpeedPercent is interpolated by Nix as a literal number, so we use it directly in Bash arithmetic
+              actual_pwm=$(( max_pwm * ${fanSpeedPercent} / 100 ))
+              echo "Setting PWM to $actual_pwm"
+              echo "$actual_pwm" > "$hwmon/pwm1"
+
+              echo "Fan speed set successfully"
+              exit 0
+            else
+              echo "Fan control files not found in $hwmon"
+            fi
+          fi
+        done
+
+        echo "No hwmon directory found for device $dev"
+        exit 1
+      fi
+    done
+
+    echo "GPU with bus $BUS not found"
+    exit 1
+  '';
+
+in {
+
+  systemd.services.gpu-fan-control = {
+    description = "Set AMD GPU fan speed at boot";
+    wantedBy = [ "multi-user.target" ];
+    after = [ "multi-user.target" "udev.service" ];
+
+    serviceConfig = {
+      Type = "oneshot";
+      ExecStart = "${fanControlScript}";
+      RemainAfterExit = true;
+      StandardOutput = "journal";
+      StandardError = "journal";
+    };
+  };
+
+  # Optional: Add a manual service for runtime fan control
+  systemd.user.services.gpu-fan-control-manual = {
+    description = "Manual GPU fan control (user service)";
+    wantedBy = [ "default.target" ];
+
+    serviceConfig = {
+      Type = "oneshot";
+      ExecStart = "${fanControlScript}";
+      RemainAfterExit = true;
+      StandardOutput = "journal";
+      StandardError = "journal";
+    };
+  };
+
+}

desktop/l/gpu-fan-control.nix

@@ -10,7 +10,7 @@
 
   boot.initrd.availableKernelModules = [ "xhci_pci" "ahci" "nvme" "usbhid" "usb_storage" "sd_mod" ];
   boot.initrd.kernelModules = [ ];
-  boot.kernelModules = [ "kvm-amd" ];
+  boot.kernelModules = [ "kvm-amd" "nct6775" "it87" "acpi_ec_sensors" ];
   boot.extraModulePackages = [ ];
 
   fileSystems."/" =
@@ -38,5 +38,9 @@
   # networking.interfaces.enp1s0.useDHCP = lib.mkDefault true;
 
   nixpkgs.hostPlatform = lib.mkDefault "x86_64-linux";
+
   hardware.cpu.amd.updateMicrocode = lib.mkDefault config.hardware.enableRedistributableFirmware;
+
+  hardware.i2c.enable = true;
+  #hardware.sensor.hddtemp.enable = true;
 }