High battery usage

General system Newbie
1

Well, i am on NixOS, NixOS forum did not replied there so i’m asking here, Also i have a new dell battery.

This is from the wiki, i was not sure about “power” here, it should be “powersave” right?

services.tlp = {
      enable = true;
      settings = {
        CPU_SCALING_GOVERNOR_ON_AC = "performance";
        CPU_SCALING_GOVERNOR_ON_BAT = "powersave";

        CPU_ENERGY_PERF_POLICY_ON_BAT = "power";
        CPU_ENERGY_PERF_POLICY_ON_AC = "performance";

        CPU_MIN_PERF_ON_AC = 0;
        CPU_MAX_PERF_ON_AC = 100;
        CPU_MIN_PERF_ON_BAT = 0;
        CPU_MAX_PERF_ON_BAT = 20;

       #Optional helps save long term battery health
       START_CHARGE_THRESH_BAT0 = 40; # 40 and bellow it starts to charge
       STOP_CHARGE_THRESH_BAT0 = 80; # 80 and above it stops charging

      };
};

This is my code that i’m using.

{
  # Power Management tool
  # powerManagement.enable = true;

  # Battery Optimizations
  services.tlp = {
      enable = true;
      settings = {
        CPU_SCALING_GOVERNOR_ON_AC = "performance";
        CPU_SCALING_GOVERNOR_ON_BAT1 = "powersave";

        CPU_ENERGY_PERF_POLICY_ON_BAT1 = "powersave";
        CPU_ENERGY_PERF_POLICY_ON_AC = "performance";

        CPU_MIN_PERF_ON_AC = 0;
        CPU_MAX_PERF_ON_AC = 100;
        CPU_MIN_PERF_ON_BAT1 = 0;
        CPU_MAX_PERF_ON_BAT1 = 20;

       #Optional helps save long term battery health
       START_CHARGE_THRESH_BAT1 = 40; # 40 and bellow it starts to charge
       STOP_CHARGE_THRESH_BAT1 = 80; # 80 and above it stops charging
      };
  };

  # Better scheduling for CPU cycles - thanks System76!!!
  services.system76-scheduler.settings.cfsProfiles.enable = true;

  # Enable powertop
  powerManagement.powertop.enable = true;

  # Disable GNOMEs power management
  # services.power-profiles-daemon.enable = false;
 
  # Governor
  # powerManagement.cpuFreqGovernor = "powersave";
}

NixOS wiki is outdated, So is everything look good to you?
I use Hyprland and stable branch nixos.

2

Not a TLP user so I may not be able to help you further, but, having a look at the documetation, there doesn’t seem to be a powersave value for CPU_ENERGY_PERF_POLICY_ON_BAT

CPU_ENERGY_PERF_POLICY_ON_AC/BAT

CPU_ENERGY_PERF_POLICY_ON_AC=balance_performance CPU_ENERGY_PERF_POLICY_ON_BAT=balance_power

Set CPU energy/performance policies (in order of increasing power saving):

  • performance
  • balance_performance
  • default
  • balance_power
  • power

Default when unconfigured: balance_performance (AC), balance_power (BAT)

https://linrunner.de/tlp/settings/processor.html#cpu-energy-perf-policy-on-ac-bat

3

well, i have fixed it now, i should have read the docs for TLP, well i have tried to set the battery charging percents but non of them has worked, also there is not good doc for it, also tried bing ai, didn’t work too. lol

#Optional helps save long term battery health
START_CHARGE_THRESH_BAT1 = 40; # 40 and bellow it starts to charge
STOP_CHARGE_THRESH_BAT1 = 80; # 80 and above it stops charging

well i have tried dell-command-configure didn’t work too.

4

Doesn’t this need to be supported by your machine’s firmware?

You might need to look into what are the requirements for setting battery charge threshold in Linux.

Also, see: https://linrunner.de/tlp/faq/battery.html#how-to-enable-charge-thresholds

5

Perhaps this is relevant:

https://bugs.kde.org/show_bug.cgi?id=450551

6

I have checked it, as far I know, no it’s need a kernel module which is in cctk. I really just want but how will i do that i don’t even know.

sudo cctk --primarybatterycfg=custom:50-95 --ValSetupPwd="password"   

fopen_wrapper.c: Replacing path '/usr/lib/ext/dell/omreg.cfg' with '/nix/store/ws238hvr083c1401b4k2hv3vh1wd4lx6-dell-command-configure-unpacked-4.8.0-494/srvadmin-hapi/opt/dell/srvadmin/etc/omreg.d/omreg-hapi.cfg'
fopen_wrapper.c: Replacing path '/usr/lib/ext/dell/omreg.cfg' with '/nix/store/ws238hvr083c1401b4k2hv3vh1wd4lx6-dell-command-configure-unpacked-4.8.0-494/srvadmin-hapi/opt/dell/srvadmin/etc/omreg.d/omreg-hapi.cfg'

Error in Setting the Value.