HP laptop temperature expectations

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HP 8440p laptop starts up at 50C and idles with at 51-52 (all temperatures Celcius). Light use (Firefox) sees a max temp at 83. When starting at 51, invoking Firefox drives temp to 67 and back down to 54 (51->67->54)

What is Firefox doing during the lengthy \dramatic transient: (51->67->54)
Is the idle-Firefox temperature reasonable? Does anyone else out there with an 8440p have similar experiences?

Heavy use (video transcoding) can drive temperatures so high as to cause shutdown. Had to put in powersave mode to regulate CPU demand so as to not overheat-shutdown.

UPDATE: 1-hour Disassembly revealed dust. Does it makes sense to put it back together and expect reasonable cooling> OR shall I wait and apply thermal paste to the CPU / heatsink? It is disassembled as far as possible without disturbing the factory thermal paste.

Link to Gallery of before and after photos

Compressed-air treatment:

monkeyman_stones

You are right to be concerned. 83 degrees C is far more than high enough to prevent the function of the CD/DVD/BD drive and damage other hardware. If your computer is out of warranty I strongly recommend you download the repair manual for the EliteBook 8440p directly from HP (you can call them and ask them to email you a link to the manual [which is on their webpage]) and use it to dismantle the entire case, clear/clean the copper cooling components where they pass air out of the case to the outside and if you have a static strap and a safe work area where you can remove the heatsink, then the poor thermal grease which HP applies and use Arctic MX-4 thermal grease (it has one of the highest thermal conductivity [W/mK] rates of any thermal grease) which will allow your hardware to run cooler than it did when the computer was brand new. I did exactly this to my HP HDX18t and it reduced the standard running temperatures by 40 degrees F (nearly 5 degrees C) and the heavy use temperatures have never reached over 155 degrees F [68 degrees C] with extremely heavy use (trying to push it to it's absolute limits) outdoors in the sun on a 90 degree F day (32.3 degrees C). As for Firefox causing such an extreme problem with your computer I would recommend re-installing it to ensure it is correctly downloaded and installed sudo apt-get install --reinstall firefox as it sounds (from your description) as though Firefox may be part of the problem.

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edited at2021-07-14

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