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Tricks and Tips to Reduce Power Consumption in linux by Mr. Pratik P. Solanki


As we all know that as compared to Windows, Linux consumes more power. therefore, it might be advisable to use some of the following steps to save power in your laptop. I am thankful to Mr. Pratik P. Solanki for testing and Sharing this important information with me via e-mail and now i am sharing it with you. though we don’t provide any guaranty of any of the code below. so try it at your own risk.

  • Enable ALPM:
  • echo SATA_ALPM_ENABLE=true | sudo tee /etc/pm/config.d/sata_alpm
  • can save ~1-2W, may cause data corruption on some hardware
  • Change background to a lighter colour on laptop LCD
  •     can save ~1%
  • Enable i915 rc6:
  • kernel parameter: i915.i915_enable_rc6=1
  • can save 25-40% on Sandybridge
  • known to lockup on some machines
  • Enable i915 Framebuffer Compression:
  • kernel parameter: i915.i915_enable_fbc=1
  • LessWatts believes it can save 0.6 Watts
  • DRM vblank off delay:
  •   kernel parameter: drm.vblankoffdelay=1
  • Reduces wakeup events, possibly saves power
  • Disable any wireless you don’t need (e.g. from desktop or blacklist bluetooth)
  • E.g. bluetooth, saves ~1-2W
  • Disable webcam
  •   add “blacklist uvcvideo” to /etc/modprobe.d/blacklist.conf
  • can save ~1-2W
  • Use PowerTop to put the following devices into a “Good” power saving state:
  • Webcam
  • Audio
  • DRAM
  • Ethernet
  • Wifi
  • Bluetooth
  • SATA link
  • MMC/SD
  • Use Ubuntu Precise kernel – has PCIe ASPM fix in.
  • Or force to powersave using kernel parameter: pcie_aspm=powersave
  • Laptop Backlight
  • Don’t use at full brightness.
  • Drop to 2/3 brightness level – will save ~1W
  • Disable flashing cursor on gnome-terminal:
  • gconftool-2 –type string –set /apps/gnome-terminal/profiles/Default/cursor_blink_mode off
  • can save a few wakeups/second


Please share your valuable feedback via comments….

Courtesy: Mr. Pratik P. Solanki

From → Technology

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