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Bug #14467

open

Temperature sensor reading is abnormally high on some systems

Added by Marcos M over 1 year ago. Updated about 1 year ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
Hardware / Drivers
Target version:
-
Start date:
Due date:
% Done:

0%

Estimated time:
Release Notes:
Default
Affected Plus Version:
23.01
Affected Architecture:
1537, 1541

Description

The temperature reading dev.pchtherm.0.temperature was introduced in 23.01 and it seems to be incorrect. It fluctuates between 170-178F (seen on the dashboard widget).

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 #1

Updated by Marcos M over 1 year ago

  • Subject changed from Incorrect temperature reading to Temerature sensor reading is abnormally high
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 #2

Updated by Steve Wheeler over 1 year ago

This is not true for all pchtherm devices though. For example:

[23.05-RC][admin@m470.stevew.lan]/root: sysctl dev.pchtherm.0.temperature
dev.pchtherm.0.temperature: 35.5C

Specifically the 1541 and 1537 return higher values than expected:

[23.05-RELEASE][root@XG-1537-DUT-1.test.netgate.com]/root: sysctl dev.pchtherm.0.temperature
dev.pchtherm.0.temperature: 75.5C

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 #3

Updated by Marcos M over 1 year ago

  • Subject changed from Temerature sensor reading is abnormally high to Temperature sensor reading is abnormally high on some systems
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 #4

Updated by Kris Phillips over 1 year ago

This command doesn't appear to work on Cordoba-based platforms, but I believe there is a PCH for the NVME interfaces, so not sure why it wouldn't have a readout here unless there isn't a temp sensor present.

Tested on 23.09 with result:
sysctl: unknown oid 'dev.pchtherm.0.temperature'

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 #5

Updated by Jim Pingle over 1 year ago

PCH isn't there on dev snaps because of #14727

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 #6

Updated by Jordan G about 1 year ago

getting unknown oid in the latest build 23.09.a.20230929.2350

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 #7

Updated by Rob A about 1 year ago

This is probably what I am experiencing on a Xeon D-1736NT (Ice Lake) on 23.09-RC (23.09.r.20231027.0151)

sysctl: unknown oid 'dev.pchtherm.0.temperature'

Indeed, there are no temperature values at from PCH / PCIe with only CPU related temp values or limits available.

For example:

dev.coretemp.7.%domain: 0
dev.coretemp.7.%parent: cpu7
dev.coretemp.7.%pnpinfo: 
dev.coretemp.7.%location: 
dev.coretemp.7.%driver: coretemp

dev.cpu.7.temperature: 45.0C
dev.cpu.7.coretemp.throttle_log: 0
dev.cpu.7.coretemp.tjmax: 100.0C
dev.cpu.7.coretemp.resolution: 1
dev.cpu.7.coretemp.delta: 55
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