[Matt Devo]

Yes, I will do that. However, there are at least two of those "AER: error corrected" bugs reported recently for kernel 4.19. I am not sure if each of those bugs are triggered by the same thing. This one is about the same PCIe port: https://bugzilla.kernel.org/show_bug.cgi?id=199695 As a small workaround I added pci=nomsi to the kernel command line. It "helps" for the time being, at least on my Chromebox. Surely just a workaround, since it only suppresses a possible driver problem.

text:


mount -o remount,rw /flash

vi /flash/EFI/BOOT/syslinux.cfg

reboot

If you do not boot through EFI, possibly just edit /flash/syslinux.cfg

 as a corollary, the issue isn't AER or the lack of support thereof; disabling AER and rebuilding the firmware will eliminate the error messages, but not fix the performance issue.  Disabling MSI via kernel parameter fixes the performance issue, so that would seem to be where the issue lies.  I'll dig a little further