| Summary: | 3h of work on battery on FreeBSD while 10h on Windows | ||
|---|---|---|---|
| Product: | Base System | Reporter: | Slawomir Wojciech Wojtczak <vermaden> |
| Component: | amd64 | Assignee: | freebsd-amd64 (Nobody) <amd64> |
| Status: | Closed Overcome By Events | ||
| Severity: | Affects Only Me | CC: | allanjude |
| Priority: | Normal | ||
| Version: | 10.0-CURRENT | ||
| Hardware: | Any | ||
| OS: | Any | ||
|
Description
Slawomir Wojciech Wojtczak
2013-08-14 12:40:00 UTC
Try adding the following to /etc/rc.conf performance_cx_lowest="CMAX" # Online CPU idle state economy_cx_lowest="CMAX" # Offline CPU idle state it enables the intel 'c-states' which should help Also, setting the following in /boot/loader.conf: hint.p4tcc.0.disabled=1 hint.acpi_throttle.0.disabled=1 will remove the non 'Intel Enhanced SpeedStep' speeds from the list of frequencies that powerd will try to use, which should also save some power also look at: https://wiki.freebsd.org/TuningPowerConsumption It includes an example on disabling the nvidia card. While setting it to 'off' in the bios hides it, it does not actually seem to power it down. After sysctl and loader tunning I got about 6 hours, enought. |