Miscellaneous

System Won’t Reboot After the Shutdown Process Completes

Check the Intel Watchdog isn't blacklisted, some performance guides will tell you to disable it for speed, breaking reboots.

sudo grep -iR "blacklist iTCO_wdt" /etc/modprobe.d/ 

If you see any output like

/etc/modprobe.d/blacklist.conf:blacklist iTCO_wdt

Edit the file containing the line

nano /etc/modprobe.d/blacklist.conf

And comment out the line, restart one more time and it should be fixed.

#blacklist iTCO_wdt