It sounds like you're reporting a problem with the nouveau driver.
Unfortunately the attached logs don't show the "flood" you refer to.
Please copy and paste an example of the message flood.
** Package changed: xorg (Ubuntu) => linux (Ubuntu)
** Changed in: linux (Ubuntu)
Status: New => Incomplete
** Summary changed:
- Nvidia problems
+ Nouveau problems
** Tags added: nouveau
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https://bugs.launchpad.net/bugs/1775452
Title:
Nouveau problems
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