![]() The line Runtime D3 status: will show whether or not your laptop supports this configuration. For that, set dynamic_power_management=fine in the section of the configuration file, then reboot to "hybrid" mode and run cat /proc/driver/nvidia/gpus/0000:01:00.0/power (your GPU might have a different PCI address than 0000:01:00.0 but it should be the only folder in gpus/). It's unclear whether or not AMD CPUs are supported, but you can always try and switch to another method if it doesn't work.įirst, make sure your hardware supports configuration is supported. If you are not in this case, skip to the next section. Note : this configuration is only available for laptops with Turing-generation GPU or above + Coffee Lake Intel CPU or above. Configuration 1 : dynamic power management inside the Nvidia driver (Runtime D3 power management) Once you've found a working configuration, write it down in /etc/optimus-manager/nf so that optimus-manager can use it for every boot. If you are unsure what to do, try them out in that order. Read the following sections for a few suggested configurations. If you do end up in such a state though, don't panic : just edit your boot options to mask the optimus-manager service (or boot to console with the multi-user target), then undo your changes. The purpose of this feature is to allow tinkering with the power management options without ending up in a state where the machine just locks up at boot. Then optimus-manager will revert to the normal user configuration. ![]() This temporary configuration will only be loaded once, at the next startup of the optimus-manager service (which normally happens at boot). ![]() However it's also possible to submit a TEMPORARY configuration file by running : The user configuration file is located at /etc/optimus-manager/nf. The power management options must be set in the configuration file. Of course, if your laptop is always plugged in or don't care about battery life, you can just ignore this page and leave the default configuration untouched. Therefore, don't be surprised if optimus-manager does not improve your battery life straight away : you must first configure it manually to use the proper power switching method, in order for the Nvidia GPU to be turned off when unused. The reason for this choice is that pretty much every laptop model model requires a specific method, and using the wrong one can lead to complete system lockups, weird driver issues, or unexpected reboots. optimus-manager supports several ways to control the power state of the Nvidia GPU, however since v1.2 they are all disabled by default. The whole point of the Optimus technology in laptops is that your Nvidia GPU can be turned off when you are not using it, resulting in significant power savings. A guide to power management options in optimus-manager ![]()
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