Here is a button of very limited interest, developers only.
Will be surprised if this one gets more than 6 downloads.
Since the Kernel's message ring buffer does not survive re-boots.
And its normal dump file (messages) is on tmpfs, which does not survive re-boots - - -
Here is a button to copy the ring buffer to a dmesg-YYYY-MM-DDtHH.MMutc document (text) file in documents.
Developers know what this is good for, everyone else can ignore it.