kern/140361: [cpufreq] speed-stepping broken on PhenomII (acpi?)
freebsd at soulrebel.in-berlin.de
Thu Aug 19 15:40:03 UTC 2010
The following reply was made to PR kern/140361; it has been noted by GNATS.
From: Hannes <freebsd at soulrebel.in-berlin.de>
To: bug-followup at freebsd.org
Subject: Re: kern/140361: [cpufreq] speed-stepping broken on PhenomII (acpi?)
Date: Thu, 19 Aug 2010 15:16:53 +0000
I can re-afirm this bug with 8.1-RELEASE on the system mentioned before
and also on a second system.
The second system uses this CPU:
%dmesg | grep -i amd
root at mason.cse.buffalo.edu:/usr/obj/usr/src/sys/GENERIC amd64
CPU: AMD Athlon(tm) II X2 240e Processor (2800.01-MHz K8-class CPU)
Origin = "AuthenticAMD" Id = 0x100f62 Family = 10 Model = 6
Stepping = 2
The levels look correct:
%sysctl dev.cpu.0.freq dev.cpu.0.freq_levels
dev.cpu.0.freq_levels: 2800/22790 2450/19941 2100/16660 1837/14577
1600/13837 1400/12107 1200/10377 1000/8648 800/6200 700/5425 600/4650
500/3875 400/3100 300/2325 200/1550 100/775
There is no speed-stepping detected:
%dmesg -a|egrep '^est[0-9]*'
Both mainboards are from Sapphire and both systems run amd64. Using the
x86 version of FreeBSD solves the problem, i.e. I do get est devices and
But this is not an option because of memory requirements.
As this bug is marked as feedback, please let me know what I can do to
help get this issue fixed.
Thank you very much!
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