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

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You have been subscribed to a public bug by Sebastien Bacher (seb128):

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

** Affects: libatasmart
     Importance: Unknown
         Status: Unknown

** Affects: libatasmart (Ubuntu)
     Importance: Medium
     Assignee: Phillip Susi (psusi)
         Status: In Progress

** Affects: libatasmart (Ubuntu Trusty)
     Importance: Medium
         Status: Confirmed

** Affects: libatasmart (Ubuntu Xenial)
     Importance: Medium
         Status: Confirmed

** Affects: libatasmart (Ubuntu Yakkety)
     Importance: Medium
         Status: Confirmed


** Tags: patch xenial
-- 
constantly shows wrong temperature (99°C )
https://bugs.launchpad.net/bugs/1581594
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