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Subject: [Bug 196468] Powerd hangs my AMD APU system
Date: Sat, 03 Jan 2015 20:18:13 +0000
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X-Bugzilla-Version: 10.1-STABLE
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X-Bugzilla-Who: ditf.robins@gmail.com
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=196468

            Bug ID: 196468
           Summary: Powerd hangs my AMD APU system
           Product: Base System
           Version: 10.1-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: freebsd-bugs@FreeBSD.org
          Reporter: ditf.robins@gmail.com

Created attachment 151300
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=151300&action=edit
crash dump log

When powerd is running it always reboots (or hangs) my system after a while. I
start powerd with "-a adaptive" or "-a hiadaptive" flags and it starts to scale
cpu clock speed. After a while i walk away from my pc to watch some tv, eat
dinner, etc., but when i return to my pc it always has rebooted. 

This has been an issue starting from 10.0-RELEASE (i'm no on 10.1-STABLE
r276610 now).

CPU: AMD A8-5600K APU with Radeon(tm) HD Graphics (3593.35-MHz K8-class CPU)

I have added crash dump (core.txt.2) and powerd output from when the utility
was started till the point it freezes (powerd.log).


How to reproduce: start powerd utility on AMD system and then let powerd to
scale down cpu to minimum and then the pc reboots or hangs.

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