Comment 111 for bug 1521173

I've been getting a similar problem on a Leopard GP73-8RE laptop from MSI, on Ubuntu 20.04 as well as 19.10 and 18.04.

This is the message that spammed in my system journal, causing it to inflate very rapidly to ludicrous proportions:

    22:36:51 kernel: alx 0000:03:00.0: AER: [ 7] BadDLLP
    22:36:51 kernel: alx 0000:03:00.0: AER: device [1969:e0a1] error status/mask=00000080/00002000
    22:36:51 kernel: alx 0000:03:00.0: AER: PCIe Bus Error: severity=Corrected, type=Data Link Layer, (Receiver ID)

I tried the following kernel parameters:

-`pci=nomsi`: this also disabls removable devices... not an option.

-`pci=noaer` : disables advanced error reporting without fixing the errors themselves. It works insofar as it suppresses the message flood. However, this is akin to "shooting the messenger": it also prevents troubleshooting other, potentially more serious, errors that won't be reported as well. Plus, letting errors occur continuously might not be the optimal solution, even though these errors are apparently getting corrected.

-`pci=nommconf`: this gets rid of the errors, and so far hasn't had any undesirable side effect. I'll report back if I notice any.

Someone on reddit has also suggested `pcie_aspm=off` :
https://www.reddit.com/r/linuxquestions/comments/g8pbku/any_undesirable_side_effects_of_pcinommconf/foq8eut/

But I haven't tried it myself.