>Number:         189267
>Category:       amd64
>Synopsis:       AMD Kabini (AM1/FM1Sb) Frequency Switching Causes Crash
>Confidential:   no
>Severity:       non-critical
>Priority:       low
>Responsible:    freebsd-amd64
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Fri May 02 22:00:00 UTC 2014
>Closed-Date:
>Last-Modified:
>Originator:     Brodey Dover
>Release:        9.2-RELEASE-p4
>Organization:
>Environment:
FreeBSD freenas.brodeydover.ca 9.2-RELEASE-p4 FreeBSD 9.2-RELEASE-p4 #0 r262572+
17a4d3d: Wed Apr 23 10:09:38 PDT 2014     [email protected]:/tank/home/j
kh/build/9.2.1/freenas/os-base/amd64/fusion/jkh/9.2.1/freenas/FreeBSD/src/sys/FR
EENAS.amd64  amd64
>Description:
Running powerd on FreeNAS system with C6 state enabled in BIOS causes the 
system to crash shortly after start-up. Disabling the C6 state in the BIOS 
resolves the system crashing but then one does not receive the low power modes 
afforded by the platform. 

Disabling powerd, however, enabling CnQ and C6 state in the BIOS also resolves 
the system crashing with the same effect; no low power modes. I also note 
significant power usage from a system that should otherwise be consuming less 
power than my Skt 939 90W TDP X2 3800+ with 4x DDR 1GB modules. I noted that 
the GPU was also never down-clocked and would never enter any low power modes.

I feel that this is a serious compatibility issue for hardware (that I think 
was released when 9.2 was production). 
>How-To-Repeat:
Run hardware on FreeBSD 9.2. (I haven't tried FreeBSD 10).
>Fix:
N/A

>Release-Note:
>Audit-Trail:
>Unformatted:
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