Being unable to ssh into a machine I connected it to a monitor and found the following:

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The machine is running Ubuntu Server 18.04 LTS and is a first generation 8 core Ryzen 1700. I've restarted the machine since and it works fine but am not sure what caused this in the first place and want to avoid it happening again.

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  • A good place to start is typing the error messages into your favourite search engine. – Iain Feb 10 at 22:27
  • You should also examine your logs to see if there is any more relevant information. – Iain Feb 10 at 22:28
  • @lain I've googled the problem and didn't find anything reasonable. One solution online said that it was related to nvidia GPU, which I've since removed and the issue still happens. It might be something obvious that I am missing, which logs should I check and what should I be looking for? – Greg Feb 10 at 23:22
  • Do read this: kernel.org/doc/Documentation/RCU/stallwarn.txt By value of the other errors you can see that the issue was somewhere in snapd, so one of the apps installed via snapd might be the culprit of lockup, which cascaded to the rest of the system. – Gothrek Feb 13 at 17:32

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