4 Replies Latest reply on Nov 28, 2014 6:09 PM by deium

    temperature issue

    shb

      hi

      i ve got 2 edisons and one of the two is getting hot, sometimes to hot that he dies.

      the hot edison is flashed right now with the latest image and i ve nothing installed and no programm started, just system startup

       

      this is the temperature from the hot one

      root@edison:/sys/devices/virtual/thermal# cat thermal_zone*/temp

      cat: read error: Invalid argument

      12342

      cat: read error: Invalid argument

      78000

      83000

      and the normal one

      root@ubilinux:/sys/devices/virtual/thermal# cat thermal_zone*/temp

      cat: thermal_zone0/temp: Invalid argument

      18808

      cat: thermal_zone2/temp: Invalid argument

      35000

      34000

      i thought it was an issue with ubilinux or with my build hardware. i am not sure if something went wrong during the development.

      thats why i flashed back to stock, but no improvement

       

      any ideas what i can do?

      underclocking cpu? or does someone know this issue and has a solution for this problem?

       

      bye stefan

        • 1. Re: temperature issue
          deium

          shb, I haven't seen any positive results of attempting to under clock the edison, though under clocking has been proposed a couple of times in the forums.

          The cpu is fixed at 500 MHz minimum and 500 MHz maximum, so I don't have a fix.  Personally in a last resort effort,  I would let hot Edison rest to get tempatures back to room tempature, and see if the hot Edison module still heats up to that degree on the other breakout using different cables then used when Edison heated up.

          That might aleast narrow it down to being a module/board or cable issues.

          • 2. Re: temperature issue
            shb

            i ve tryed to cool it down to room temperature, but it heats up to 81 again.

            i ve alread changed the breakout board. at the beginning it was on the minibreakout now its on the arduino breakout with no wires or something else

            does someone know at which temperature the edison will die?

            • 3. Re: temperature issue
              deium

              The Intel stated spec is 0C to 40C for operations, though it does go a bit higher, they haven't adjusted it thus far.  78C near double for sure.  I don't know if sometime of cooling system might keep it alive longer - the fact it is still talking is a testament.  I don't think a heat sink can help as the processor is on the underside (closest the Breakout board) of the module.  Direct air cooling with a fan is also not a long term solution.

              • 4. Re: temperature issue
                deium

                shb

                The last answer on the temperatures were that they were doing tests and that when they had a more official answer that it would be posted in the documentation Software & Documentation section