I am also affected by this issue, however on a wholly different platform
- an intel H370 based motherboard with a Core i3-8100 CPU. It was
suggested that I attempt to supress logging output via a sysrq keyboard
combo, so I pressed alt+sysrq+0 but this appears to be disabled by
default as I saw the following printed to the TTY along with the IRQ
handler messages:

sysrq: SysRq : This sysrq operation is disabled.

It would be great if some proper attention would be paid to this issue
as it makes the use of such systems via TTY extremely frustrating.

Should I perhaps try the most up to date mainline kernel I can find?

Thanks

** Attachment added: "dmesg on cold boot"
   
https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1781016/+attachment/5222398/+files/dmesg-cold.txt

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Title:
  Slow flood of do_IRQ: No irq for vector

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