Decode MCE (Machine Check Exception) in Ubuntu 18.04

I have a system running Ubuntu 18.04, which is randomly freezing. In the boot log entries like

mce: [Hardware Error]: CPU 0: Machine Check: 0 Bank 4: e600000000020408

appear. In older Ubuntu versions, mcelog could be used to decode these entries. mcelog has since been removed. How do I decode the log entries to figure out where the fault comes from in Ubuntu 18.04?

1 Answer

mcelog can still be compiled and executed manually. If you have git and a build toolchain installed, you can run:

git clone git://
cd mcelog
make
./mcelog --ascii < /path/to/logfile

The logfile should contain content similar to:

CPU 0: Machine Check: 0 Bank 4: e600000000020408
TSC 0 ADDR fef13b80
PROCESSOR 0:506c9 TIME 1565455642 SOCKET 0 APIC 0 microcode 38

mcelog will print decoded information to stdout.