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wx@tour:~$ lspci
00:00.0 Host bridge: Intel Corporation 82G33/G31/P35/P31 Express DRAM Controller (rev 10) 00:01.0 PCI bridge: Intel Corporation 82G33/G31/P35/P31 Express PCI Express Root Port (rev 10) 00:1b.0 Audio device: Intel Corporation NM10/ICH7 Family High Definition Audio Controller (rev 01) 00:1d.0 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #1 (rev 01) 00:1d.1 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #2 (rev 01) 00:1d.2 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #3 (rev 01) 00:1d.3 USB controller: Intel Corporation NM10/ICH7 Family USB UHCI Controller #4 (rev 01) 00:1d.7 USB controller: Intel Corporation NM10/ICH7 Family USB2 EHCI Controller (rev 01) 00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev e1) 00:1f.0 ISA bridge: Intel Corporation 82801GB/GR (ICH7 Family) LPC Interface Bridge (rev 01) 00:1f.1 IDE interface: Intel Corporation 82801G (ICH7 Family) IDE Controller (rev 01) 00:1f.2 IDE interface: Intel Corporation NM10/ICH7 Family SATA Controller [IDE mode] (rev 01) 00:1f.3 SMBus: Intel Corporation NM10/ICH7 Family SMBus Controller (rev 01) 01:00.0 VGA compatible controller: Advanced Micro Devices, Inc. [AMD/ATI] RV770 [Radeon HD 4870] 01:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI] RV770 HDMI Audio [Radeon HD 4850/4870] 02:01.0 Ethernet controller: D-Link System Inc RTL8139 Ethernet (rev 10) 02:05.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8110SC/8169SC Gigabit Ethernet (rev 10) |
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You can check if DPM is working from the terminal by running: sudo cat /sys/kernel/debug/dri/64/radeon_pm_info. Source: askubuntu.com/questions/324733/… . Also the info about DPM might be in a different directory. Read the link for more details. |
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Using the dynamic power management feature requires updated firmware for the graphics card. The latest Radeon microcode/firmware can be downloaded from this directory. You need the *_smc.bin files from June. If you're unsure of your specific graphics card codename, you can generally find it from looking at output of lspci -v | less ... The file(s) need to be placed within /lib/firmware/radeon. If you try to use Radeon DPM without the firmware, acceleration will end up being disabled for the GPU. You also need to make sure you have the updated firmware in /lib/firmware/radeon before installing the >3.11 kernel - it will be pulled automagically into the installed image. |
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The Radeon DPM support is not enabled by default below Linux kernel 3.13, or for older GPUs. You must add the radeon.dpm=1 parameter to the Linux kernel to enable it in these cases. |
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4.1 Gestion dynamique matérielle Attention, on modifie ici des options de démarrage, une manipulation non compatible risque d'empêcher votre machine de démarrer. Vous pouvez faire cela en ajoutant la commande "radeon.dpm=1" au fichier de configuration /etc/default/grub: Ouvrez le fichier /etc/default/grub avec des droits d'administration. Repérez la ligne GRUB_CMDLINE_LINUX_DEFAULT="quiet splash" Modifiez la en: GRUB_CMDLINE_LINUX_DEFAULT="quiet splash radeon.dpm=1" Puis enregistrez. Il reste alors à mettre Grub à jour: sudo update-grub L'effet sera actif au prochain démarrage. Au cas où votre OS ne démarre plus, il est conseillé de tester auparavant avec : GRUB_CMDLINE_LINUX_DEFAULT="radeon.dpm=1" |
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dmesg | grep radeon |
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