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    "Page fault while in kernel mode" on APU2 after bios/coreboot upgrade

    General pfSense Questions
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    • AKEGECA
      AKEGEC
      last edited by

      @CS , every hardware has a different outcome in Q.C. Even with the same parts, but a different batch.
      Rule of thumb, 4 years lifespan (4 is death in Chinese). Nowadays you should be happy if your electronic works for more than 4 years.

      I am not sure how handy you are but you could try heating up the cpu (without thermal paste) with the heat gun on a flat surface. Keep around 10 cm distance with circular motion for around 10-15 mins. But be warn, you could burn the cpu.

      DaddyGoD 1 Reply Last reply Reply Quote 0
      • DaddyGoD
        DaddyGo @AKEGEC
        last edited by

        @AKEGEC said in "Page fault while in kernel mode" on APU2 after bios/coreboot upgrade:

        but you could try heating up the cpu (without thermal paste) with the heat gun on a flat surface.

        It's a very bad idea.
        This AMD CPU reaches its maximum TDP in about 40 seconds without a cooling surface (heat shrink) and dies...
        (moreover as I wrote it is an embedded CPU, soldered to the PCB)
        (earlier than the said Chinese 4-year death)

        the pcEngines stuff is stable and we have several pieces of it that has been working for 6 years (from ALIX and APU series)

        The ALIXs works as a radio os WISP PtP and AP and is constantly exposed to the weather.
        So these are not subject to your Chinese rule 😉

        Cats bury it so they can't see it!
        (You know what I mean if you have a cat)

        AKEGECA 1 Reply Last reply Reply Quote 0
        • AKEGECA
          AKEGEC @DaddyGo
          last edited by

          @DaddyGo said in "Page fault while in kernel mode" on APU2 after bios/coreboot upgrade:

          It's a very bad idea.
          This AMD CPU reaches its maximum TDP in about 40 seconds without a cooling surface (heat shrink) and dies...
          (moreover as I wrote it is an embedded CPU, soldered to the PCB)
          (earlier than the said Chinese 4-year death)

          the pcEngines stuff is stable and we have several pieces of it that has been working for 6 years (from ALIX and APU series)

          The ALIXs works as a radio os WISP PtP and AP and is constantly exposed to the weather.
          So these are not subject to your Chinese rule 😉

          Well to solder embedded cpu you need a temperature between 200-400°c.
          Anyway I was talking about heating it up a bit. As long you are not reaching 90°c you will be fine. But if it already passed the 4 years mark, then I would leave it as it is. 😏
          I don't know why manufactures are shortening their products lifespan. It used to be 15-30 years quality guarantee.

          DaddyGoD 1 Reply Last reply Reply Quote 0
          • DaddyGoD
            DaddyGo @AKEGEC
            last edited by DaddyGo

            @AKEGEC said in "Page fault while in kernel mode" on APU2 after bios/coreboot upgrade:

            Well to solder embedded cpu you need a temperature between 200-400°c.

            Yes, this soldering temperature is a separate data in the catalog and the automatic production lines (soldering machines) solder to the permitted seconds. (2 - 3s)
            The temperature of the inner silicon layer of the CPU does not tolerate this temperature (cca. 150 max).

            I don't know, if you already had an APU MOBO in your hand?
            So this is what it looks like...
            (the metal router housing itself cools the CPU and connects to the metal surface with a bit of heat transfer)

            fc118a87-03a7-4d5d-9522-c1531c604811-image.png

            https://www.pcengines.ch/apucool.htm

            As I wrote above, the test method for the following may be, CPU shock test under f.e. Linux and while covering the house.

            Once we launched such a MOBO without its metal housing for testing and it "boiled" quickly under load.

            You're right, half of today's stuff can't stand it until then 25-30 years. 😞
            Anno, I even repaired 30-year-old cathode ray tubes and black and white televisions and continued to operate for another 10 years.

            Welcome to today's money-hungry world. hahahahaha 😉

            Cats bury it so they can't see it!
            (You know what I mean if you have a cat)

            1 Reply Last reply Reply Quote 1
            • AKEGECA
              AKEGEC
              last edited by

              @DaddyGo , did we just revealed our age? hahahahahaa
              Oh well age is just a number. 😊

              DaddyGoD 1 Reply Last reply Reply Quote 0
              • DaddyGoD
                DaddyGo @AKEGEC
                last edited by

                @AKEGEC said in "Page fault while in kernel mode" on APU2 after bios/coreboot upgrade:

                did we just revealed our age?

                Not a shame ...
                the age, I think, brings wisdom

                yea and everyone is as old as he/she feel 😉

                droll - quadragenarian, hihihihi

                Cats bury it so they can't see it!
                (You know what I mean if you have a cat)

                1 Reply Last reply Reply Quote 0
                • G
                  garywagstaff @CS
                  last edited by

                  @cs Thank you CS, I found this post after a couple of weeks of trying to sort out the exact same issue. I cant count the different firmwares I tried and reinstalls of PFsense. Even tried OPNsense. Long story short updated to v4.13.0.3 BIOS disabled CPB and my firewall has been stable since. Uptime 18 Hours 56 Minutes 32 Seconds at present, but I am quietly confident that the issue is resolve.

                  Once again thank you.

                  K 1 Reply Last reply Reply Quote 0
                  • K
                    Kuser @garywagstaff
                    last edited by

                    @cs Thank you very much for this post, it seems I have the same issue... Is this due to a defective board/cpu - has your firewall been running stable since disabling SPB?

                    C 1 Reply Last reply Reply Quote 0
                    • C
                      CS @Kuser
                      last edited by

                      @kuser Super stable, I have had no issues at all since then!

                      K 1 Reply Last reply Reply Quote 0
                      • K
                        Kuser @CS
                        last edited by

                        @cs Thanks for the feedback. Looks like they've found a bug.
                        I reported this issue a couple of weeks ago:
                        https://github.com/pcengines/coreboot/issues/469

                        1 Reply Last reply Reply Quote 1
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