Powersave

These files enable power saving on Linux. Note that these settings are applied regardless of whether the system is on battery or AC. Power saving is applied to:

• Audio card (modprobe.d/99-powersave.conf)
• Backlight brightness (rules.d/50-powersave-brightness.rules)
• Bluetooth (disabled completely:modprobe.d/blacklist.conf)
• NMI watchdog (sysctl.d/99-powersave.conf)
• Writeback times (sysctl.d/99-powersave.conf)
• Laptop mode (sysctl.d/99-powersave.conf)
• Network interfaces, both wired and wireless (modprobe.d/50-powersave-net.rules)
• Buses (ASPM, PCI, USB, SATA ALPM,tmpfiles.d/powersave.confandmodprobe.d/50-powersave-[pci|usb|sata].rules)

Power saving isnotapplied to:

• HDD, since it is replaced with an SSD. SSD power usage is simply ignored, since I have yet to look into this (and I believe it isn't that high). Tips are welcome!
• CPU frequencies, since the default is fine (using theintel_pstatedriver).
• Swappiness, since I don't use a swap partition.

You might also want to edit/etc/fstabto addcommits=<seconds>to theoptionscolumn of your partitions. See themount man page.

It is fit for my own laptop (Lenovo Thinkpad Edge E130), which means that this script willnot work on every setup. Pleasecheckthis before running it on your computer! Things might break otherwise and I amnotresponsible for any damage that has been done.

TODO

• git grep TODO
• Test the suspend-on-low-battery udev rule (rules.d/50-powersave-suspend.rules)
• SSD powersaving?
  • Apply noop schedular in powersave instead of boot config?

Installation

The script will need the following dependencies to run:

• iw
• ip
• ethtool
• udev
• systemd

Just runmake installas root to install the whole set.

To enable the ASPM setting to work, appendpcie_aspm=forceto your kernel parameter list. However, before doing so, verify that all PCIe hardware on your system support ASPM!