thermal problem? playback hangs when cputemp is only 48 C
I have been testing a LePotato board with no heatsink, decoding 4K HEVC and VP9 content with the latest CoreELEC image: CoreELEC-LePotato.arm-8.90.4.img.gz
I am monitoring the cpu temperature with
cputemp and after 10-20 minutes of playback when the core temperature reaches around 48 C the processor hangs, playback stops, and the ssh terminal session is dead. By the way,
gputemp always displays the same value as
If I put an external fan over the board, the core temperature stays around 32-35 C and the same clips will play in a loop all day. This does seem to be a thermal related issue.
Any processor will fail when the operating temperature is too hot, except in this case the temperature at failure is quite low. For example, the maximum rated operating temperature of an Intel Core i7 processor is around 67 C.
Using my temperature calibrated finger also tells me that this processor isn't very hot when playback fails. I have seen other processors working correctly when too hot to touch. The AM905X is only warm when the system fails. Sure I can put a heat sink and fan on it, but 48 C is too cool for failure IMHO and I want to understand what is going on.
- What is the maximum core operating temperature for AM905X, as specified by Amlogic?
- Is this a thermal problem involving memory (which isn't hot to the touch at all)
- Has anyone else noticed this?
- Do I have a bad processor (that maybe should have failed manufacturing test) on my LePotato?
cputempinaccurate and reporting lower than actual temperature? (It reports the same info as