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    Uart0 interrupts on high level on APU.1D4 –ver. 2.2

    General pfSense Questions
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    • B
      Bronko last edited by

      Sometimes, after two or more days, without serial connection established on a full installation from USB stick to mSATA 16GB, the interrupts on uart0 (console) are on high level:

      [2.2-RELEASE][admin@box.lan]/root: vmstat -i
      interrupt                          total       rate
      irq4: uart0                    526788821       1896
      irq16: ath1                     38711555        139
      irq17: ehci0 ehci1+               185438          0
      irq18: ohci0 ohci1*                    2          0
      irq19: ath0 ahci0               11836455         42
      irq256: hpet0:t0               309913938       1115
      irq257: hpet0:t1               110004189        395
      irq259: re0                     61685974        222
      irq260: re1                        85377          0
      irq261: re2                     32864397        118
      Total                         1092076146       3930
      
      [2.2-RELEASE][admin@box.lan]/root: top -aSH
      ...
        PID USERNAME   PRI NICE   SIZE    RES STATE   C   TIME    WCPU COMMAND
         11 root       155 ki31     0K    32K RUN     1  46.8H  89.60% [idle{idle: cpu1}]
         11 root       155 ki31     0K    32K CPU0    0  46.2H  87.50% [idle{idle: cpu0}]
         12 root       -76    -     0K   288K WAIT    0   1:36   3.37% [intr{swi0: uart uart}]
      ...
      
      

      Connecting to the serial console shows nothing, hitting ENTER -> nothing
      Strg+C brings up a shell with prompt

      #
      # exit
      
      FreeBSD/amd64 (box.lan) (ttyu0)
      
      *** Welcome to pfSense 2.2-RELEASE-pfSense (amd64) on svea ***
      ...
      
      

      and solved the problem! The interrupts are gone!

      Any ideas?

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      • jimp
        jimp Rebel Alliance Developer Netgate last edited by

        Any messages in the main system log?

        Was this a fresh 2.2 install or an upgraded 2.1.5?

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        • B
          Bronko last edited by

          Was a fresh 2.2 RC install with some upgrade steps finally to Release.
          Doesn't checked the system log, sorry…

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          • B
            Bronko last edited by

            No messages in main system log regarding these issue.

            It returns for 6-12 h every 6-12 h currently.

            Any help?

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            • B
              Bronko last edited by

              Ok, the problem was the connected serial cable with the other end open for all the time, means without termination of a serial device or serial-usb adapter. May be some signal reflection/induction on the open end back to the serial port on the APU.1D4 board.

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