powerManagement

Powermanagement

`powerManagement.cpuFreqGovernor`

Configure the governor used to regulate the frequency of the available CPUs. By default, the kernel configures the performance governor, although this may be overwritten in your hardware-configuration.nix file.

Often used values: "ondemand", "powersave", "performance"

Type: null or string

Default

null

Example

"ondemand"

Declared by: https://github.com/nixos/nixpkgs/blob/master/nixos/modules/tasks/cpu-freq.nix

`powerManagement.cpufreq.max`

The maximum frequency the CPU will use. Defaults to the maximum possible.

Type: null or (unsigned integer, meaning >=0)

Default

null

Example

2200000

Declared by: https://github.com/nixos/nixpkgs/blob/master/nixos/modules/tasks/cpu-freq.nix

`powerManagement.cpufreq.min`

The minimum frequency the CPU will use.

Type: null or (unsigned integer, meaning >=0)

Default

null

Example

800000

Declared by: https://github.com/nixos/nixpkgs/blob/master/nixos/modules/tasks/cpu-freq.nix

`powerManagement.enable`

Whether to enable power management. This includes support for suspend-to-RAM and powersave features on laptops.

Type: boolean

Default

true

Declared by: https://github.com/nixos/nixpkgs/blob/master/nixos/modules/config/power-management.nix

`powerManagement.powerDownCommands`

Commands executed when the machine powers down. That is, they're executed both when the system shuts down and when it goes to suspend or hibernation.

Type: strings concatenated with "\n"

Default

""

Example

"${pkgs.hdparm}/sbin/hdparm -B 255 /dev/sda"

Declared by: https://github.com/nixos/nixpkgs/blob/master/nixos/modules/config/power-management.nix

`powerManagement.powerUpCommands`

Commands executed when the machine powers up. That is, they're executed both when the system first boots and when it resumes from suspend or hibernation.

Type: strings concatenated with "\n"

Default

""

Example

"${pkgs.hdparm}/sbin/hdparm -B 255 /dev/sda"

Declared by: https://github.com/nixos/nixpkgs/blob/master/nixos/modules/config/power-management.nix

`powerManagement.powertop.enable`

Whether to enable powertop auto tuning on startup. Type: boolean

Default

false

Example

true

Declared by: https://github.com/nixos/nixpkgs/blob/master/nixos/modules/tasks/powertop.nix

`powerManagement.resumeCommands`

Commands executed after the system resumes from suspend-to-RAM. Type: strings concatenated with "\n"

Default

""

Declared by: https://github.com/nixos/nixpkgs/blob/master/nixos/modules/config/power-management.nix

`powerManagement.scsiLinkPolicy`

SCSI link power management policy. The kernel default is "max_performance".

"med_power_with_dipm" is supported by kernel versions 4.15 and newer.

Type: null or one of "min_power", "max_performance", "medium_power", "med_power_with_dipm"

Default

null

Declared by: https://github.com/nixos/nixpkgs/blob/master/nixos/modules/tasks/scsi-link-power-management.nix