Re: [Powertop] Regression: read_msr cpu0 0x3fe : Input/output error
This also happens on BYT-M N2830 CPU... and likely all other BYT-M SKUs.
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U. Artie
From: PowerTop [mailto:powertop-bounces@lists.01.org] On Behalf Of Eoff, Ullysses A
Sent: Wednesday, February 18, 2015 12:27 PM
To: powertop(a)lists.01.org
Subject: [Powertop] Regression: read_msr cpu0 0x3fe : Input/output error
Powertop fails with error: "read_msr cpu0 0x3fe : Input/output error" on BYT-M
N3540 CPU (model 0x37).
From the sourcecode, it appears c7 support depends on the presence of
"/sys/bus/pci/devices/0000:00:13.0" for model 0x37. Directory
"/sys/bus/pci/devices/0000:00:13.0" does not exist on my system.
The commit that introduced this problem is:
commit e01a025bc37f730379edc001e7f12fa269b68fbd
Author: alexandra.yates@linux.intel.com<mailto:alexandra.yates@linux.intel.com>
<alexandra.yates@linux.intel.com<mailto:alexandra.yates@linux.intel.com>>
Date: Fri Aug 22 02:52:19 2014 -0700
bug fix intel bdw: package c-state support
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U. Artie
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