powerd failure

mhany

New Member


Messages: 1

Hi there,
At startup always I got error
Code:
powerd: no cpu freq(4)
/etc/rc: failed to start powerd.

Thanks.
 

kpa

Beastie's Twin

Reaction score: 1,853
Messages: 6,318

What CPU? If it's an intel CPU that lacks EIST the p4tcc and apci_throttle mechanisms are disabled by default on 10.2 and newer effectively leaving powerd(8) no throttling mechanism to use, hence the error. Equivalent power savings or better can be achieved by using the C-states on such CPUs:

https://wiki.freebsd.org/TuningPowerConsumption
 

wblock@

Beastie Himself
Developer

Reaction score: 3,752
Messages: 13,851

powerd != powered

It is important to be exact on these things. Extra or missing letters can change the problem or solution entirely. The same goes for upper and lower case letters.
 

SirDice

Administrator
Staff member
Administrator
Moderator

Reaction score: 13,071
Messages: 39,685

Also note that powerd(8) does not work inside a VM. A virtual guest cannot change the frequency of the host's CPUs.
 
Top