Bug #14467
open
Temperature sensor reading is abnormally high on some systems
Added by Marcos M over 1 year ago.
Updated 12 months ago.
Category:
Hardware / Drivers
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).
- Subject changed from Incorrect temperature reading to Temerature sensor reading is abnormally high
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
- Subject changed from Temerature sensor reading is abnormally high to Temperature sensor reading is abnormally high on some systems
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'
PCH isn't there on dev snaps because of #14727
getting unknown oid in the latest build 23.09.a.20230929.2350
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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