From cb3b01a74c30d20cd7df3b5ca6b547e971eee9fc Mon Sep 17 00:00:00 2001
From: Tom Alexander <tom@fizz.buzz>
Date: Wed, 15 Jan 2025 21:01:30 -0500
Subject: [PATCH] Blacklist hardward watchdog for AMD 700 chipset series for
 power savings.

---
 nix/configuration/hosts/odo/power_management.nix | 8 ++++++++
 nix/configuration/roles/network/default.nix      | 7 ++++++-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/nix/configuration/hosts/odo/power_management.nix b/nix/configuration/hosts/odo/power_management.nix
index 0973577..4668d74 100644
--- a/nix/configuration/hosts/odo/power_management.nix
+++ b/nix/configuration/hosts/odo/power_management.nix
@@ -48,4 +48,12 @@
     "w- /sys/devices/system/cpu/cpufreq/policy14/energy_performance_preference - - - - power"
     "w- /sys/devices/system/cpu/cpufreq/policy15/energy_performance_preference - - - - power"
   ];
+
+  boot.extraModprobeConfig = ''
+    # Disable the hardware watchdog inside AMD 700 chipset series for power savings.
+    blacklist sp5100_tco
+
+    # Sound power-saving was causing chat notifications to be inaudible.
+    # options snd_hda_intel power_save=1
+  '';
 }
diff --git a/nix/configuration/roles/network/default.nix b/nix/configuration/roles/network/default.nix
index e77582c..5a00641 100644
--- a/nix/configuration/roles/network/default.nix
+++ b/nix/configuration/roles/network/default.nix
@@ -26,7 +26,7 @@
   ];
   services.resolved = {
     enable = true;
-    dnssec = "true";
+    # dnssec = "true";
     domains = [ "~." ];
     fallbackDns = [ ];
     dnsovertls = "true";
@@ -61,4 +61,9 @@
     ldns # for drill
     arp-scan # To find devices on the network
   ];
+
+  boot.extraModprobeConfig = ''
+    # Set wifi to US
+    options cfg80211 ieee80211_regdom=US
+  '';
 }