Watchdog for Linux

Solution:

• Watchdog for Linux (Simple Test Instructions)

  For the models listed on this page, the watchdog functionality does not require an additional driver installation. You can use the built-in Linux kernel driver to enable and utilize the watchdog feature directly.
  
  w83627hf_wdt
  --------------
  
  PPC-31xx-RE9x, PPC-6121, PPC-415-PB5, PPC-31x EHL, PPC-321W EHL, PPC-3xxW TGL, PPC-4xx EHL, PPC-4xxW-PD, PPC-306 EHL, PPC-3xxSW ADL-N, PPC-MB-610, PPC-MB-620, PPC-MB-8260
  TPC-307W, TPC-310W, TPC-B300-x20A, TPC-3xx EHL, TPC-B520, TPC-B520L, TPC-B610
  UNO-148, UNO-148 V2, UNO-2484G V2, UNO-348
  
  wdat_wdt
  ----------
  
  UNO-137 V2, UNO-2271G V2, UNO-2372G V2, UNO-127
  
  Watchdog service installation
  -----------------------------
  
  #apt-get install watchdog
  
  #vi /etc/default/watchdog
  
  replace watchdog_module="none" with Watchdog_module="w83627hf_wdt"
  NOTE: Please change the “w83627hf_wdt” according to the above watchdog driver list.
  
  #vi /etc/watchdog.cong
  delete # of #watchdog-device
  
  Start watchdog service
  #systemctl start watchdog
  
  Enable watchdog service
  #systemctl enable watchdog
  
  Check if the watchdog service is active or running
  #systemctl status watchdog
  
  Watchdog function check
  ---------------------
  
  Method 1
  Enter the following command to hang the system and see if the watchdog restarts the system after a timeout(default is 60s).
  #echo c | sudo tee /proc/sysrq-trigger
  
  Method 2
  If you have started the watchdog service, please disable it and then reboot. #systemctl stop watchdog
  
  #systemctl disable watchdog
  #reboot
  
  Load watchdog module once
  #modprobe w83627hf_wdt
  (Please change the “w83627hf_wdt” according to the watchdog driver table)
  
  Check if the watchdog is loaded
  #ls /dev/watchdog
  
  Enter the following command to start the watchdog test. If you kill the watchdog (Ctrl+C), the system will reboot after 60 seconds.
  #watchdog -v –F
  
  Reference
  --------
  
  In “/etc/watchdog.conf”, you can add “watchdog-timeout” for a specific timeout. For more details: https://manpages.ubuntu.com/manpages/focal/man5/watchdog.conf.5.html