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From: Sean Bruno <seanbru@yahoo-inc.com>
To: freebsd-stable <freebsd-stable@freebsd.org>
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Date: Thu, 17 May 2012 22:32:09 -0700
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Subject: [stable 9] broken hwpstate calls
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Looks like my AMD box isn't quite working correctly with regards to
P-states.    I noted this repeating periodically:
hwpstate0: set freq failed, err 6


I noted these errors when setting the hwpstate verbose systctl on:

May 17 22:28:32 Alice kernel: hwpstate0: set freq failed, err 6
May 17 22:28:32 Alice kernel: hwpstate0: setting P1-state on cpu0
May 17 22:28:32 Alice kernel: hwpstate0: result  P1-state on cpu0
May 17 22:28:32 Alice kernel: hwpstate0: setting P1-state on cpu1
May 17 22:28:32 Alice kernel: hwpstate0: result  P1-state on cpu1
May 17 22:28:32 Alice kernel: hwpstate0: setting P1-state on cpu2
May 17 22:28:32 Alice kernel: hwpstate0: result  P1-state on cpu2
May 17 22:28:32 Alice kernel: hwpstate0: setting P1-state on cpu3
May 17 22:28:32 Alice kernel: hwpstate0: result  P1-state on cpu3
May 17 22:28:32 Alice kernel: hwpstate0: setting P1-state on cpu4
May 17 22:28:32 Alice kernel: hwpstate0: result  P1-state on cpu4
May 17 22:28:32 Alice kernel: hwpstate0: setting P1-state on cpu5
May 17 22:28:32 Alice kernel: hwpstate0: result  P1-state on cpu5
May 17 22:28:32 Alice kernel: hwpstate0: setting P1-state on cpu6
May 17 22:28:32 Alice kernel: hwpstate0: result  P1-state on cpu6
May 17 22:28:32 Alice kernel: hwpstate0: setting P1-state on cpu7
May 17 22:28:32 Alice kernel: hwpstate0: result  P1-state on cpu7


Sean

ref this machine:  http://forums.pcbsd.org/showthread.php?t=16733