This may be related to https://bugzilla.kernel.org/show_bug.cgi?id=209725
If you can run a v5.5 or newer kernel, try this to see if it's a workaround:
# echo 0 > /sys/devices/pci0000:00/0000:00:01.2/0000:01:00.0/link/l1_aspm
More gory details at:
https://lore.kernel.org/r/
[email protected]
If you can reproduce this problem and the workaround above works, please let us know at
[email protected]. We would really like help to get this fixed. The output of "sudo lspci -vv" would be helpful.