Try put pcie_aspm=off in the kernel boot line of grub.
You might try editing or creating a new file in /etc/modprobe.d called e1000e.conf and adding a line to that that
options e1000e IntMode=1,1
Each 1 is for each NIC. Eg. If you have 2 e1000e NICs you need the above.
Another option to try is:
setpci -s 02:00.0 CAP_EXP+10.b=40
setpci -s 03:00.0 CAP_EXP+10.b=40
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