Background: I have a dual Xeon e5-2697 v3 system running Ubuntu 20.04.02 LTS using an Asus Z10PE-D16 WS motherboard. The system has been running reliably for the past year almost continuously.
Yesterday I applied that past week’s updates, which included an Intel microcode update (v3.20210608) and rebooted. It then ran fine all day. Around 01:17 in the morning syslog shows a number of Gnome related crashes which finally brought down the X server, and then at 01:18 the system locked-up completely. When I found it this morning both CPU error lights on the motherboard were lit up.
Eventually I rebooted the machine and it appears to be running fine again. Has anyone else had any stability problems with this microcode release?