What to do in response to a kernel warning

Another here - my laptop's i915 driver spews messages about corrupt EDID data on every boot. It used to be at warning severity but it seems they've downgraded it.

But graphics drivers aside, I've had actual WARN_ONs recently too, one was a soft lockup timeout because an NFS mount tree went away during a system upgrade. I would rather not have a spontaneous panic/reboot there before I get a chance to ensure the reboot will actually succeed.