I recently installed last year's Mint Debian and just installed this year's version.
Both of them tell me about that mysterious temp1. (I don't get a temp2.) Sure, I found a way to ventilate and expel a little more hot air but the temp1 was 10°F too low. (Excuse me. I use metric for a lot of things but not temperature.) I got that from hardinfo the times I looked at it. Recently I added MATE Sensors Applet 1.2.1 to the tool bar to show the temperature. It was showing 115°F. So I rebooted and didn't wait. I pressed F2 to go to the CMOS settings on my Intel 865 board. It said the CPU was 125° and "Zone 1" was 98° and "Zone 2" was 105°.
It seems as if this temp1 is an average of the CPU and one other sensor.
This feature needs fixing. I want a warning when I am overworking my CPU. The other temperatures are not so important.