[Bug 1581594] Re: constantly shows wrong temperature (99°C )

[Phillip Susi]

Sorry for the late reply Martin... my bugs mailbox has gotten quite
backed up.  I emailed smartmontols-devel about the issue and their
response was:

There likely was some historic HDD which used attribute 231 for
temperature (same for 9 and 220).

And yes, there are devices which report temperature in more than one
attribute.

They went on to say they would probably change smartmontools to prefer
the more common attribute and I thought that libatasmart should follow
suit.


Will create the upstream bug report, though the last one or two I have created with patches attached have gone ignored there for years so...

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Title:
  constantly shows wrong temperature (99°C )

Status in libatasmart package in Ubuntu:
  Incomplete

Bug description:
  Hello, here's my system info

  ~$ lsb_release -rd
  Description:	Ubuntu 16.04 LTS
  Release:	16.04

  ~$ apt-cache policy udisks2
  udisks2:
    Installed: 2.1.7-1ubuntu1
    Candidate: 2.1.7-1ubuntu1
    Version table:
   *** 2.1.7-1ubuntu1 500
          500 http://archive.ubuntu.com/ubuntu xenial/main amd64 Packages
          100 /var/lib/dpkg/status

  
  Here's the problem: udisks2 constantly shows that my ssd temperature is 99°C (210°F), but in reality it's 30°C

  
  ~$ sudo smartctl -A /dev/sda
  smartctl 6.5 2016-01-24 r4214 [x86_64-linux-4.4.0-22-generic] (local build)
  Copyright (C) 2002-16, Bruce Allen, Christian Franke, www.smartmontools.org

  === START OF READ SMART DATA SECTION ===
  SMART Attributes Data Structure revision number: 16
  Vendor Specific SMART Attributes with Thresholds:
  ID# ATTRIBUTE_NAME          FLAG     VALUE WORST THRESH TYPE      UPDATED  WHEN_FAILED RAW_VALUE
    1 Raw_Read_Error_Rate     0x000b   100   100   050    Pre-fail  Always       -       0
    9 Power_On_Hours          0x0012   100   100   000    Old_age   Always       -       24
   12 Power_Cycle_Count       0x0012   100   100   000    Old_age   Always       -       51
  168 Unknown_Attribute       0x0012   100   100   000    Old_age   Always       -       0
  170 Unknown_Attribute       0x0003   100   100   010    Pre-fail  Always       -       231
  173 Unknown_Attribute       0x0012   100   100   000    Old_age   Always       -       65539
  192 Power-Off_Retract_Count 0x0012   100   100   000    Old_age   Always       -       23
  194 Temperature_Celsius     0x0023   070   070   030    Pre-fail  Always       -       30 (Min/Max 30/30)
  218 Unknown_Attribute       0x000b   100   100   050    Pre-fail  Always       -       0
  231 Temperature_Celsius     0x0013   100   100   000    Pre-fail  Always       -       99
  241 Total_LBAs_Written      0x0012   100   100   000    Old_age   Always       -       337


  in the GUI app ("Disks") it shows the wrong temperature too. hddtemp
  works well though:

  ~$ sudo hddtemp /dev/sda
  /dev/sda: PNY EU SSD CS1311 240GB: 30°C

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