Frequency scaling error on AMD Turion [hwpstate]

George Liaskos geo.liaskos at
Sun Feb 14 22:55:24 UTC 2010

Hello list!

I am trying remotely to help a friend set up his laptop with 8.0-STABLE amd64,
installation went pretty smooth but i have a problem with power saving.

When i start powerd i get the following error repeatedly:

kernel: hwpstate0: set freq failed, err 6

> dmesg | grep -i cpu
CPU: AMD Turion(tm)X2 Dual Core Mobile RM-70 (2000.08-MHz K8-class CPU)
FreeBSD/SMP: Multiprocessor System Detected: 2 CPUs
 cpu0 (BSP): APIC ID: 0
 cpu1 (AP): APIC ID: 1
cpu0: <ACPI CPU> on acpi0
acpi_throttle0: <ACPI CPU Throttling> on cpu0
hwpstate0: <Cool`n'Quiet 2.0> on cpu0
cpu1: <ACPI CPU> on acpi0
SMP: AP CPU #1 Launched!

dev.cpu.0.%desc: ACPI CPU
dev.cpu.0.%driver: cpu
dev.cpu.0.%location: handle=\_PR_.CPU0
dev.cpu.0.%pnpinfo: _HID=none _UID=0
dev.cpu.0.%parent: acpi0
dev.cpu.0.freq: 1750
dev.cpu.0.freq_levels: 2000/15620 1750/13667 1500/11715 1250/9762 1000/5605
dev.cpu.0.cx_supported: C1/0
dev.cpu.0.cx_lowest: C1
dev.cpu.0.cx_usage: 100.00% last 500us

I am using a 20100101 snapshot but i do a sync with latest right now.


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