https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=244083
Bug ID: 244083
Summary: amdtemp(4) says CPU/cores temp is near freezing on
releng/12
Product: Base System
Version: 12.1-RELEASE
Hardware: amd64
OS: Any
Status: New
Severity: Affects Some People
Priority: ---
Component: kern
Assignee: b...@freebsd.org
Reporter: portmas...@bsdforge.com
OK I grabbed some spares out of the server closet
to assemble a builder box. The parts included a 4
core AMD X4 CPU.
I also grabbed a hard disk that already had an older
copy of 12-CURRENT installed on it. After booting into
the system, I discovered that FreeBSD said the
temperature of the CPU was ~1.1C! Contrary to the
earlier POSTing into the BIOS which reported a
temperature ~34-38C.
Here's the output from the 5 AMD CPUs I have immediately
available (all running newish to 2day old releng/12):
# grep -F Ath /var/run/dmesg.boot
CPU: AMD Athlon(tm) II X3 440 Processor (3013.96-MHz K8-class CPU)
# sysctl -a | grep tempe
dev.cpu.2.temperature: 31.5C
dev.cpu.1.temperature: 31.5C
dev.cpu.0.temperature: 31.5C
# dmidecode -t4 | grep AMD
Manufacturer: AMD
Version: AMD Athlon(tm) 64 X2 Dual Core Processor 4200+
# sysctl -a | grep tempe
hw.acpi.thermal.tz0.temperature: 32.1C
dev.cpu.1.temperature: 45.0C
dev.cpu.0.temperature: 48.0C
# dmidecode -t4 | grep AMD
Manufacturer: AMD
Version: AMD FX(tm)-6300 Six-Core Processor
# sysctl -a | grep tempe
dev.cpu.5.temperature: 30.1C
dev.cpu.4.temperature: 30.1C
dev.cpu.3.temperature: 30.1C
dev.cpu.2.temperature: 30.1C
dev.cpu.1.temperature: 30.1C
dev.cpu.0.temperature: 30.1C
# dmidecode -t4 | grep AMD
Manufacturer: AMD
Version: AMD Athlon(tm) II X4 630 Processor
# sysctl -a | grep tempe
dev.cpu.3.temperature: 33.5C
dev.cpu.2.temperature: 33.5C
dev.cpu.1.temperature: 33.5C
dev.cpu.0.temperature: 33.5C
# # # BROKEN
# dmidecode -t4 | grep AMD
Manufacturer: AuthenticAMD
Version: AMD Athlon(tm) X4 860K Quad Core Processor
# sysctl -a | grep tempe
dev.cpu.3.temperature: 13.1C
dev.cpu.2.temperature: 13.1C
dev.cpu.1.temperature: 13.1C
dev.cpu.0.temperature: 13.1C
NOTE: the last entry which under a normal load (as
the others) only reports 13.1C -- up from 1-7C.
I can easily provide additional info as needed. As
well as peek/poke/test anything necessary.
Thank you for all your time, and consideration.
--Chris
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