lm-sensors: From sensors command, what is "Package id 0"?

in flag

When I run sensors on my xubuntu machine, I get the following:

Adapter: ISA adapter
Package id 0:  +80.0°C  (high = +100.0°C, crit = +100.0°C)
Core 0:        +80.0°C  (high = +100.0°C, crit = +100.0°C)
Core 1:        +46.0°C  (high = +100.0°C, crit = +100.0°C)
Core 2:        +53.0°C  (high = +100.0°C, crit = +100.0°C)
Core 3:        +48.0°C  (high = +100.0°C, crit = +100.0°C)
Core 4:        +46.0°C  (high = +100.0°C, crit = +100.0°C)
Core 5:        +47.0°C  (high = +100.0°C, crit = +100.0°C)

Adapter: ACPI interface
in0:          14.88 V  
curr1:         1.20 A  

Adapter: Virtual device
temp1:        +41.0°C  

Adapter: Virtual device
temp1:        +51.0°C  

Adapter: ACPI interface
temp1:        +49.0°C  (crit = +120.0°C)

My computer has 6 CPU cores (shows 12 CPU on htop etc), and the Package id 0: is consistently at 75°C or above.

When I unplug my charging cable the temperature goes back down to 45°C or 50°C.

What is Package id 0? And should I be worried about +80.0°C for a laptop?

PS: My computer freezes randomly maybe twice in a day and becomes completely unresponsive. I have to use the physical power button to reboot. I think it's caused by temperatures and individual CPUs randomly jump to 80 and back down to 45. This specific question relates to package id 0 though. I'm wondering if my sensors be malfunctioning...

Artur Meinild avatar
vn flag
Most laptops are *really poorly* pasted from the factory - it's usually so bad it's almost a joke. I would under all circumstances recommend that you re-paste the CPU. If you're not comfortable doing this yourself, get a hold of someone who can help.
in flag
Thanks for your answer. This is funny because I have paid extra to get a better quality thermal paste from the manufacturer. And you are right, package shows the maximum temp for the underlying CPUs. Haven't noticed until you've pointed it out.
Artur Meinild avatar
vn flag
Yeah - but thermal paste only lasts so long. I actually repaste once a year if I can get around to it - the paste dries out over time. Cheers!
Artur Meinild avatar
vn flag
Also, I suspect the reason it reduces temperature when unplugged is that the CPU lowers the frequency to save power - this is quite normal.
BeastOfCaerbannog avatar
ca flag
Related question: [What is "Physical id 0" shown in Psensor?](
vn flag

Package id 0 is used to reference the CPU "as a whole".

I have no idea why this name is chosen, nor could I find any reference for it.

In addition, you have temperature monitors for each core.

Package id 0 will typically have the highest value among cores - or a bit higher.

80.0°C is a bit on the hot side. I would say between 60 and 70°C when idle is OK, and between 80 and 90°C with high CPU load.

If it gets hotter than that, you should try re-pasting your CPU (off-topic here, but search on YouTube).

in flag
Nothing is said about "package id 0" anywhere on SO. This will help others as well.

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