Add power saving settings.

ansible/roles/framework_laptop/files/disable_sp5100_watchdog_modprobe.conf

@@ -0,0 +1,2 @@
+# Disable the hardware watchdog inside AMD 700 chipset series for power savings.
+blacklist sp5100_tco

ansible/roles/framework_laptop/files/iwlwifi_modprobe.conf

@@ -0,0 +1,5 @@
+options iwlwifi power_save=1
+
+options iwlwifi uapsd_disable=0
+
+options iwlmvm power_scheme=3

ansible/roles/framework_laptop/files/snd_hda_intel_modprobe.conf

@@ -0,0 +1,2 @@
+# Sound power-saving was causing chat notifications to be inaudible.
+# options snd_hda_intel power_save=1

ansible/roles/framework_laptop/tasks/linux.yaml

@@ -18,3 +18,28 @@
     group: wheel
   loop:
     - screen_brightness
+
+- name: Install module config
+  copy:
+    src: "files/{{ item }}_modprobe.conf"
+    dest: "/etc/modprobe.d/{{ item }}.conf"
+    mode: 0644
+    owner: root
+    group: wheel
+  loop:
+    - iwlwifi
+    - snd_hda_intel
+    - disable_sp5100_watchdog
+
+- name: Configure kernel command line
+  zfs:
+    name: "zroot/linux"
+    state: present
+    extra_zfs_properties:
+      # amdgpu.abmlevel=3 :: Automatically reduce screen brightness but tweak colors to compensate for power reduction.
+      # pcie_aspm=force pcie_aspm.policy=powersupersave :: Enable PCIe active state power management for power reduction.
+      # nowatchdog :: Disable watchdog for power savings (related to disable_sp5100_watchdog above).
+      # amd_pstate=passive :: Fully automated hardware pstate control.
+      # amd_pstate=active :: Same as passive except we can set the energy performance preference (EPP) to suggest how much we prefer performance or energy efficiency.
+      # amd_pstate=guided :: Same as passive except we can set upper and lower frequency bounds.
+      "org.zfsbootmenu:commandline": "rw quiet amdgpu.abmlevel=3 pcie_aspm=force pcie_aspm.policy=powersupersave nowatchdog amd_pstate=passive"