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[Launchpad Bug Tracker <1656528@xxxxxxxxxxxxxxxxxx>]

This bug was fixed in the package thermald - 1.5.4-4

---------------
thermald (1.5.4-4) unstable; urgency=medium

  * fix spamming of logs when writes file (LP: #1656528)
    - patch from  Srinivas Pandruvada at Intel, not yet mainline

 -- Colin King <colin.king@xxxxxxxxxxxxx>  Thu, 23 Feb 2017 09:26:23
+0000

** Changed in: thermald (Ubuntu Zesty)
       Status: Fix Committed => Fix Released

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https://bugs.launchpad.net/bugs/1656528

Title:
  thermald spamming syslog with 'sysfs write failed
  constraint_0_power_limit_uw'

Status in thermald package in Ubuntu:
  Fix Released
Status in thermald source package in Xenial:
  In Progress
Status in thermald source package in Yakkety:
  In Progress
Status in thermald source package in Zesty:
  Fix Released

Bug description:
  [SRU REQUEST, Xenial, Yakkety]

  Thermald is spamming the log with error messages on sysfs write
  failure messages.  Demote these to debug level errors so that they
  aren't logged unless running in debug mode.

  [FIX]

  See comment #24, with the fix the messages are not logged when in
  normal non-debug running mode.

  [REGRESSION POTENIAL]

  Minimal, this just reduces the logging spam by turning messages into
  debug only for when running in debug mode.

  ---------------------------------------

  
  This seems somewhat related to https://bugs.launchpad.net/ubuntu/+source/thermald/+bug/1543046

  For some reason thermald is writing the message "sysfs write failed
  constraint_0_power_limit_uw" to the syslog every few seconds. However,
  there's nothing in the kernel log.

  $ cat /etc/lsb-release
  DISTRIB_ID=Ubuntu
  DISTRIB_RELEASE=16.10
  DISTRIB_CODENAME=yakkety
  DISTRIB_DESCRIPTION="Ubuntu 16.10"

  $ uname -a
  Linux graham-desktop 4.8.0-34-generic #36-Ubuntu SMP Wed Dec 21 17:24:18 UTC 2016 x86_64 x86_64 x86_64 GNU/Linux

  $ dpkg -l | grep thermald
  ii  thermald   1.5.3-4    amd64        Thermal monitoring and controlling daemon

  $ grep "sysfs write failed constraint_0_power_limit_uw" /var/log/syslog | wc -l
  14160

  $ grep thermald /var/log/kern.log | wc -l
  0

  I'm an experienced Linux user but not an experienced bug submitter, so
  please let me know if I have failed to provide any necessary info. Am
  happy to attach additional logs.

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