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Date: Fri, 12 Dec 2008 17:12:48 +0100
From: cpghost <cpghost@cordula.ws>
To: "Arno J. Klaassen" <arno@heho.snv.jussieu.fr>
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Cc: freebsd-stable@freebsd.org
Subject: Re: 7.1-PRERELEASE: asus M3A / Phenom X4 / powerd freeze
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On Fri, Dec 12, 2008 at 12:01:29AM +0100, Arno J. Klaassen wrote:
> yet another powerd SOS : on an ASUS M3A78-EM MB with
> Phenom 9750 and 8 gig memory, starting powerd freezes
> the box after slowing down a bit cpu frequency.

(... snip ...)

> dev.cpu.0.freq_levels: 2398/-1 2098/-1 1798/-1 1498/-1 1199/-1 899/-1 599/-1 299/-1
> 
> further :
> 
>  - I set debug.cpufreq.lowest superior to 1500 : system remains
>    up but only when pushing really slightly
> 
>  -  I set debug.cpufreq.lowest inferior to 1100 : freeze
>     garantueed

Same here. Running with
  debug.cpufreq.lowest="1240"
in /boot/loader.conf to prevent freezes.

This is a FreeBSD 7.1-PRERELEASE #0: Sat Nov  8 14:18:05 CET 2008
  root@textbox:/usr/obj/usr/src/sys/GENERIC
running in amd64 and i386 mode with ACPI enabled (default):

CPU: AMD Phenom(tm) 9350e Quad-Core Processor (2000.08-MHz K8-class CPU)
  Origin = "AuthenticAMD"  Id = 0x100f23  Stepping = 3
  Features=0x178bfbff<FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,
                      PGE,MCA,CMOV,PAT,PSE36,CLFLUSH,MMX,FXSR,SSE,SSE2,HTT>
  Features2=0x802009<SSE3,MON,CX16,<b23>>
  AMD Features=0xee500800<SYSCALL,NX,MMX+,FFXSR,Page1GB,RDTSCP,LM,
                          3DNow!+,3DNow!>
  AMD Features2=0x7ff<LAHF,CMP,SVM,ExtAPIC,CR8,<b5>,<b6>,<b7>,
                      Prefetch,<b9>,<b10>>
  Cores per package: 4

using an MSI board with SB600 chipset and newest BIOS.

No idea why the system freezes below approx 1200 MHz. But apparently,
this bug is quite common and affects a lot of systems with Phenoms. :(

>  - I define hint.acpi_throttle.0.disabled="1" in loader.conf
>    then no dev.cpu.0.freq is showing up ... (as if
>    only acpi_throttle is attaching and not powernow)
> 
> Let me know what I can test further.
> 
> Best, Arno

Regards,
-cpghost.

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