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After upgrading my VPS from a shared CPU (intel) to a dedicated CPU (amd), I get a kernel panic on bootup, including if I boot into recovery mode.

I have managed to use the rescue console to get to the disk (and I'm currently copying the files off it), but what can I try or investigate to get it working again?

I also can't find the kernel panic in any logs from rescue mode (and I don't seem to be able to scroll in the console to be able to see what preceded it). Is there any way to get at those logs?

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  • Are you paying for canonical's extended support? If not - 16.04 has been out of support for 4 years, it may just hardware incompatible if the new AMD dedicated server is of a recent generation .... If yes - ask their support. Commented Jan 7 at 18:05
  • I just booted up a new Ubuntu 16 and it works (and rescaling it from intel to amd worked), so it's something else going on. I am not paying for support, so hoping to find a community thoughts on how to proceed! Commented Jan 7 at 18:31
  • If you are using journalctl, it can show logs each boots by passing option --boot=N. And you can see list of boots with --list-boots. Or if dmesg, pipe command to less to wrap long messages. Commented Jan 12 at 17:30

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