jdb wrote: ↑
Tue Nov 05, 2019 1:21 pm
Does the same temperature rise happen with no USB devices plugged in?
Right, I tried it again, and a different (and better) result I think.
I was doing stress and cooling testing, when I came upon this update. I had an idle heatsink only temp of 64.
I did the FW update, and it jumped to 71 right there and then.
I did the reboot, which was fine, and it stayed at 71
I then installed the old FW, and it stayed at 71
I rebooted, and it went to 64 again....
However, whilst I was getting ready to test some python fan control stuff, and letting the temp settle at idle, it jumped to 71.
After doing all the fan testing, it idled back to about 68.
Now after FW update second time, I had the often mentioned problem of the reboot freezing, and after hard reboot it has in fact come back a few degrees cooler.
I have run the same services each time, and when I then rebooted again, it was yet another few degrees cooler.
Ambient temperature is static, so I don't know what's going on really....
However, given that I don't have the problem anymore, and that no one else reported it, I think we can put it down to "Eddie's in the space time continuum"....
BTW: is it correct that the Pi4 idles about 20 deg hotter than 3B+ ?
65 seems quite hot for an idle CPU.