[CentOS] CentOS7 sometimes don't detect NIC after reboot

Tue Sep 17 13:31:12 UTC 2019
mark <m.roth at 5-cent.us>

Miroslav Geisselreiter wrote:
> Dne 17.9.2019 v 14:02 Mauricio Tavares napsal(a):
>> On Tue, Sep 17, 2019 at 7:06 AM Miroslav Geisselreiter <mg at intar.cz>
>> wrote:
>>> I have brand new PC with this components:
>>> CPU Intel® Pentium G5400, LGA1151
>>> motherboard ASUS PRIME B360M-C 16 GB RAM
>>> HDD 2x ADATA SSD 256GB XPG GAMMIX S11, PCIe Gen3x4 M.2 2280 (RAID1)
>>> NIC Intel X550-T1 Ethernet Converged Network Adapter
>>> I installed CentOS 7 and two NICs were detected:
>>> eno1 (on motherboard) enp1s0 (Intel X550-T1)
>>> When I restart the machine sometimes enp1s0 is missing. It is not
>>> detected during boot. It looks like NIC card is not installed / not
>>> present. After next reboot everything is fine and I do not see any
>>> problems with NIC card.
>>> How can I avoid this problem with missing NIC? Can you help me,
>>> please?
>> Nothing exciting on dmesg? Did you check the pci chain to see if
>> it is being reported as there?
Have you done lspci when it happens, and compared to when it's working?

I almost wonder if it's either a hardware error, or something in the BIOS.
Have you tried opening up the box and reseating the card?