Surface Pro 4 Power Tuning

Audio

Idle audio card after one second:

echo "options snd_hda_intel power_save=1" > /etc/modprobe.d/audio_powersave.conf

Kernel Tuning

Disable NMI watchdog. It can generate a lot of interrupts, causing a noticeable increase in power usage.

echo "kernel.nmi_watchdog = 0" > /etc/sysctl.d/disable_watchdog.conf

PCI

Enable PCI Runtime Power Management

echo "ACTION=="add", SUBSYSTEM=="pci", ATTR{power/control}="auto"" > /etc/udev/rules.d/pci_pm.rules

References

• Arch Wiki

  • Powertop

  • Power Management