Seems like a lot of folks are having this issue. Sometimes with the non operating USB mouse and keyboard. I have been able to finally get the mouse and keyboard working but the network device is still not recognized.

I have the most current bios (F2).
I have tried PCI and USB nics to no avail.

Many boards are suggesting the motherboard will not support Linux. I have a lot invested in this rig and do not want to make into a frizzbe. Gigabyte support on Linux is nonexistant.
If there is a modern 990FX motherboard that is know to work well please advise.

I have been unable to find out which Realtek chip is used.

I do not know how to add a driver to the installation iso should I ever find one that might work.

My main purpose in building this rig is to learn Linux and use multiple CPU cores and GPUs for simulations. I chose Mint as I hate command line entry (my typing does not allow me to get through long commands without error) and I can never remember such obtuse stuff.

I have tried several times over the years to get started with Linux and am always blocked by such hiccups as this.

Help!

Thanks in advance,
Lew

Can you post the output of '/sbin/lspci -k'.