I have tried to increase /proc/sys/kernel/watchdog_thresh to 60 but it still not work. I cannot find the full log because every time this stuck happens I must plug-off the power cable. I use Ubuntu 18.04.4
I have had the same issue with stock 18.04 kernels, the 19.10 kernel, and the upboard kernel from the ppa: Linux upboard 5.0.0-1-generic #2~upboard5-Ubuntu
In all cases, reboot/shutdown hangs with the same messages you see.
Hi @AchmadFathoni and @chris_yokum
Thanks for reporting the issue and the additional details on other kernels having the same.
We will investigate it further and come back to you.