[DragonFlyBSD - Bug #2814] (Closed) No CPU P-state support for AMD FX-4170

bugtracker-admin at leaf.dragonflybsd.org bugtracker-admin at leaf.dragonflybsd.org
Tue May 31 22:16:26 PDT 2016

Issue #2814 has been updated by swildner.

Status changed from New to Closed

Fixed according to sephe. Closing.

Bug #2814: No CPU P-state support for AMD FX-4170

* Author: shamaz
* Status: Closed
* Priority: Normal
* Assignee: 
* Category: 
* Target version: 
Hello. This is related to master. I have AMD FX-4170 CPU with 6 P-states.
For some reason, DragonFlyBSD can work with maximum of 5 for some CPUs.


I get a message "cpu3: only P0-P4 is allowed" and there are no frequency
related sysctls in hw.acpi.cpu

I suggest an attached patch, which works for me. Further testing requested.

wbr, Vasily.

pstate.patch (1.34 KB)

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