@megavolt Thank you !
I didn’t know about errno because I have to download a package to be able to “see” it - Thanks, now I know more.
About “more details” :
I agree with you that if -13 is permission denied than there is a BIOS issue.
So I have to look here…
I don’t know why but after I did what you suggested
sudo modprobe -vr igc
sudo modprobe -v igc debug=16
I saw that igc was reloaded and finally can “access” to the device:
dmesg | grep igc output (after PC reboot - I decided to reload system to verify will device be available after reboot):
[ 5.668806] igc 0000:03:00.0: PTM enabled, 4ns granularity
[ 5.716208] igc 0000:03:00.0 (unnamed net_device) (uninitialized): PHC added
[ 5.740536] igc 0000:03:00.0: 4.000 Gb/s available PCIe bandwidth (5.0 GT/s PCIe x1 link)
[ 5.740538] igc 0000:03:00.0 eth0: MAC: d8:5e:d3:5e:72:92
[ 6.400558] igc 0000:03:00.0 enp3s0: renamed from eth0
[ 10.340844] igc 0000:03:00.0 enp3s0: NIC Link is Up 1000 Mbps Full Duplex, Flow Control: RX/TX
From the question till your answer the PC was turned ON and was used for work without Ethernet usage. Also I didn’t open PC physically.
Now I can work with Ethernet device as before (so my question is answered), but I will add info here when will figure out why it’s happened.
Than you very much!