Any idea why all rigs crashed last night. v0018 and v0019 rigs all died and won't boot. v0018 rigs hang trying to perform cleaning functions. v0019 rigs ask for a password. v19-1.3 rigs are all running fine. Rigs are in two completely different geographic locations.
Have a look at page 245 and 246.
I think the problem is while Nvidia driver was updating wdog restarted the rig because of low utilization and that cause a miss configured Nvidia driver,
I think solution is to prevent wdog from restarting the rig if dpkg is running.