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2configs/desktops/sway: add power profile widget to eww
- Click power graph to cycle through low/normal/high profiles
- Tooltip shows current TDP and profile name
- Add sudoers rule for passwordless ryzenadj
- Use state file since ryzenadj -i doesn't work on Strix Point
author
lassulus
date
(Feb 8, 2026, 2:28 PM CET)
commit
8a0407bf
8a0407bf1a0900567ea2bc6554caab0ab3b917b4
parent
7e691f85
7e691f8582c29b54c2c44d26730f2f52c1809fea
+101
-21
-3
tools/power-profile/flake-module.nix
-3
tools/power-profile/flake-module.nix
+13
-6
tools/power-profile/power-profile.sh
+13
-6
tools/power-profile/power-profile.sh
···
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PROFILE_NORMAL=15
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PROFILE_HIGH=28
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# State file for eww integration (ryzenadj -i doesn't work on all CPUs)
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STATE_FILE="/tmp/power-profile-state"
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usage() {
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cat <<EOF
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Usage: power-profile <profile|watts>
···
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}
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set_tdp() {
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-
local stapm=$1
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local name=$1
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local stapm=$2
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# Calculate burst limits (using integer math, *10 then /10 to simulate decimals)
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local slow=$(( (stapm * 12) / 10 ))
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local fast=$(( (stapm * 15) / 10 ))
···
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echo " STAPM (sustained): ${stapm}W"
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echo " Slow limit: ${slow}W"
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echo " Fast limit: ${fast}W"
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ryzenadj --stapm-limit="$stapm_mw" --slow-limit="$slow_mw" --fast-limit="$fast_mw"
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/run/wrappers/bin/sudo /run/current-system/sw/bin/ryzenadj --stapm-limit="$stapm_mw" --slow-limit="$slow_mw" --fast-limit="$fast_mw"
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# Write state for eww integration
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echo "$name $stapm" > "$STATE_FILE"
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echo "Done."
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}
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···
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case "$1" in
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low)
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set_tdp "$PROFILE_LOW"
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set_tdp "low" "$PROFILE_LOW"
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;;
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normal)
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set_tdp "$PROFILE_NORMAL"
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set_tdp "normal" "$PROFILE_NORMAL"
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;;
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high)
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set_tdp "$PROFILE_HIGH"
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set_tdp "high" "$PROFILE_HIGH"
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;;
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-h|--help|help)
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usage
···
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;;
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*)
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if [[ "$1" =~ ^[0-9]+$ ]]; then
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set_tdp "$1"
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set_tdp "custom" "$1"
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else
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echo "Error: Unknown profile '$1'"
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usage
+88
-12
2configs/desktops/sway/eww.nix
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-12
2configs/desktops/sway/eww.nix
···
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{
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pkgs,
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lib,
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config,
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self,
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...
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}:
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let
···
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(defpoll cpu-load :interval "2s" :initial "0.00" "cut -d' ' -f1 /proc/loadavg")
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(defpoll temperature :interval "2s" :initial '{"temp": 0, "fan": 0}' "${lib.getExe tempScript}")
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(defpoll power :interval "2s" :initial '{"watts": 0, "charging": false}' "${lib.getExe powerScript}")
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(defpoll power-profile :interval "2s" :initial '{"name": "unknown", "tdp": 0}' "${lib.getExe powerProfileStatusScript}")
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(defpoll battery :interval "10s" :initial '{"capacity": "100", "icon": "", "watts": "0", "time_remaining": "--", "status": "Full"}' "${lib.getExe batteryScript}")
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(defpoll volume :interval "1s" :initial '{"level": "0", "icon": ""}' "${lib.getExe volumeScript}")
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(defpoll network :interval "5s" :initial " ..." "${lib.getExe networkScript}")
···
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(label :text "''${battery.capacity}% ''${battery.icon}")))
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(defwidget power-graph-widget []
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(box :class {power.charging ? "graph-module power charging" : "graph-module power"} :orientation "h" :space-evenly false :spacing 4
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:tooltip "''${battery.time_remaining} ''${battery.status == 'Charging' ? 'to full' : 'remaining'}"
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(graph :class "graph"
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:value {power.watts}
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:thickness 3
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:time-range "60s"
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:min 0
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:max 45
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:dynamic false
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:line-style "round"
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:width 75)
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(label :text "''${round(power.watts, 1)}W ''${power.charging ? '' : ''}")))
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(eventbox :onclick "${lib.getExe powerProfileCycleScript}"
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(box :class {power.charging ? "graph-module power charging" : "graph-module power"} :orientation "h" :space-evenly false :spacing 4
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:tooltip "TDP: ''${power-profile.tdp}W (''${power-profile.name}) | ''${battery.time_remaining} ''${battery.status == 'Charging' ? 'to full' : 'remaining'}"
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(graph :class "graph"
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:value {power.watts}
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:thickness 3
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:time-range "60s"
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:min 0
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:max 45
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:dynamic false
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:line-style "round"
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:width 75)
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(label :text "''${round(power.watts, 1)}W ''${power.charging ? '' : ''}"))))
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(defwidget volume-widget []
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(box :class "volume" :orientation "h" :space-evenly false
···
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'';
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};
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# Power profile state file (written by power-profile tool, read by eww)
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powerProfileStateFile = "/tmp/power-profile-state";
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powerProfileStatusScript = pkgs.writeShellApplication {
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name = "eww-power-profile-status";
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runtimeInputs = [ pkgs.jq ];
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text = ''
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state_file="${powerProfileStateFile}"
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if [ -f "$state_file" ]; then
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read -r name tdp < "$state_file"
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else
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name="unknown"
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tdp="?"
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fi
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jq -n --arg name "$name" --arg tdp "$tdp" '{name: $name, tdp: $tdp}'
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'';
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};
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powerProfileCycleScript = pkgs.writeShellApplication {
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name = "eww-power-profile-cycle";
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runtimeInputs = [ pkgs.libnotify ];
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text = ''
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state_file="${powerProfileStateFile}"
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# Profile names (must match power-profile tool)
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profiles=("low" "normal" "high")
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# Read current profile from state file
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current="unknown"
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if [ -f "$state_file" ]; then
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read -r current _ < "$state_file"
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fi
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# Find next profile (cycle through)
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next_idx=0
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for i in "''${!profiles[@]}"; do
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if [ "''${profiles[$i]}" = "$current" ]; then
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next_idx=$(( (i + 1) % ''${#profiles[@]} ))
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break
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fi
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done
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next="''${profiles[$next_idx]}"
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# Use the power-profile tool (uses sudo internally, writes state file)
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if /run/current-system/sw/bin/power-profile "$next" >/dev/null 2>&1; then
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notify-send -t 2000 "Power Profile" "Set to $next"
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else
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notify-send -t 2000 "Power Profile" "Failed to set profile"
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fi
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'';
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};
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ewwConfigDir = pkgs.runCommand "eww-config" { } ''
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mkdir -p $out
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cp ${ewwYuck} $out/eww.yuck
···
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in
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{
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# ryzenadj and power-profile for power profile control
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environment.systemPackages = [
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pkgs.ryzenadj
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self.packages.${pkgs.system}.power-profile
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];
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# Allow user to run ryzenadj without password (for power profile switching)
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security.sudo.extraRules = [
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{
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users = [ config.users.users.mainUser.name ];
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commands = [
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{
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command = "/run/current-system/sw/bin/ryzenadj";
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options = [ "NOPASSWD" ];
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}
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];
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}
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];
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# Make RAPL energy counters readable for power monitoring
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# Works on both Intel and AMD Zen CPUs (via intel_rapl_msr module)
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services.udev.extraRules = ''