psimon
Posts: 8
Joined: Fri May 06, 2016 8:06 pm

reported temperature incorrect

Fri Oct 12, 2018 4:00 pm

this...

'cat /sys/class/thermal/thermal_zone0/temp'

used to report Cpu temperature, but after some updates it now shows Gpu temp.

it now always gives the same temp as; '/opt/vc/bin/vcgencmd measure_temp', NOT varying with cpu load.

drgeoff
Posts: 10765
Joined: Wed Jan 25, 2012 6:39 pm

Re: reported temperature incorrect

Fri Oct 12, 2018 6:22 pm

What model RPi? What OS and version?

psimon
Posts: 8
Joined: Fri May 06, 2016 8:06 pm

Re: reported temperature incorrect

Fri Oct 12, 2018 6:53 pm

Raspberry Pi 3 Model B Rev 1.2

Linux raspberrypi 4.14.74-v7+ #1149 SMP Mon Oct 8 17:39:42 BST 2018 armv7l GNU/Linux

PRETTY_NAME="Raspbian GNU/Linux 9 (stretch)"
NAME="Raspbian GNU/Linux"
VERSION_ID="9"

psimon
Posts: 8
Joined: Fri May 06, 2016 8:06 pm

Re: reported temperature incorrect

Fri Oct 19, 2018 3:16 pm

surprised this hasn't been seen/reported by someone else yet.

of course it maybe recent and going unnoticed since the result is sensible, if you don't test it.

however if you are relying on it to stop cpu overheating, (uncommon i guess) then its pretty unfortunate.

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