![]() Now, plug the cable back in and, in less than 30 seconds, the card should come back to full power and stay there. After less than a minute, your card should drop down to minimum power (as long as you keep it idle). Now, unplug your laptop and wait for another minute. Watch it for a minute (the time it takes for the card to normally drop to lowest power) and make sure it stays at the highest power level. If your laptop is plugged in, you should see that your graphics card is running at full power. Scroll down to the bottom of the window this command brings up and look on the left side for the PowerMizer option. Now the command should run whenever you login. Add a descriptive name for the startup program (maybe, "NVidia Power") and for Command use, "/home/your_username/bin/nvidia-power.sh" (replace your_username with your username). On gnome, go to System->Preferences->Sessions, click Add. Next, we will need to add this script to run when you login. If you are on AC power, the card should now be locked at its maximum power but, if you are on battery power, you should see no difference at all (until you next plug your laptop in). Then, start a terminal and type the following: Save the script as ~/bin/nvidia-power.sh. Nice /usr/bin/nvidia-settings -q all > /dev/null Then, open up gedit and paste the following script: If you have no custom scripts, follow these instructions first: The nvidia card only drops a power level every 30 seconds so, we are going to take advantage these two facts to keep the card at maximum power if we are on AC power. ![]() The nvidia-settings has a unique property that, with essentially no CPU/GPU activity, when you ask the card to print all of its information, it causes the card to go to maximum power. If you've installed the NVidia drivers directly from the NVidia website or using envyng, you can skip this step: The first thing we will need is a utility called nvidia-settings. If you are not using compiz, this guide will not be useful for you. This HOWTO assumes you are running compiz and have already properly configured the NVidia proprietary drivers. This HOWTO is aimed primarily at users of NVidia 8 and 9 series laptop graphics cards (though, it may be useful for 7 series users as well). Unfortunately, NVidia does not provide a way to configure PowerMizer on Linux however, it's not difficult to create a script that will give you maximum speed while on AC power and maximum power savings while on battery. This is great for battery power but horrible for performance when using Desktop Effects (compiz). NVidia laptop cards come with a feature called PowerMizer that dynamically underclocks the GPU when it's not being used much.
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