{"id":2907,"date":"2014-01-25T10:03:20","date_gmt":"2014-01-25T10:03:20","guid":{"rendered":"http:\/\/ubuntuhandbook.org\/?p=2907"},"modified":"2014-01-25T10:03:20","modified_gmt":"2014-01-25T10:03:20","slug":"enable-radeon-dynamic-power-management-ubuntu","status":"publish","type":"post","link":"https:\/\/ubuntuhandbook.org\/index.php\/2014\/01\/enable-radeon-dynamic-power-management-ubuntu\/","title":{"rendered":"Enable Radeon Dynamic Power Management in Ubuntu 12.04\/13.10"},"content":{"rendered":"

\"Radeon<\/a><\/p>\n

 <\/p>\n

Since Linux Kernel 3.11, the open source AMD Radeon driver got dynamic power management (DPM) feature support. If you have already installed the Kernel 3.11 or higher<\/b> and have a Radeon HD 2000 (R600) series or newer<\/b> graphics card, you may wish to enable DPM feature by below steps (DRM will probably be enabled by default in Ubuntu 14.04<\/i>). <\/p>\n

1. Download the updated firmware from this directory<\/a>. You need the *_smc.bin<\/b> files, choose the one that matches your graphics card codename.e <\/p>\n

The *_smc.bin<\/b> files can be installed by running below command in terminal (Ctrl+Alt+T):<\/p>\n

cd ~\/Downloads\/ && .\/FILENAME_smc.bin<\/pre>\n
2. If you have Linux Kernel 3.11 or higher installed, now you can enable DPM by adding the radeon.dpm=1<\/b> parameter.<\/p>\n
In terminal (Ctrl+Alt+T), run command to edit grub:<\/p>\n
sudo gedit \/etc\/default\/grub<\/pre>\n
Find the line that says “GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash”. Add the parameter so that it will look like:<\/p>\n
GRUB_CMDLINE_LINUX_DEFAULT=”quiet splash radeon.dpm=1″<\/p><\/blockquote>\n
3. Save the file. Update the grub:<\/p>\n
sudo update-grub<\/pre>\n
4. You can further configure DPM by opening \/etc\/rc.local<\/b> and adding the following line:<\/p>\n
echo parameter > \/sys\/class\/drm\/card0\/device\/power_dpm_state<\/p><\/blockquote>\n
Where “parameter<\/b>” can be:<\/p>\n