So I am playing around with proxmox and hosting on the machine using this board. It was working fine till I really hosed up my proxmox install to the point the board was reporting the processor was dead but I fixed all that now. But it did involve reflashing the bios by booting into the second bios and then flipping the switch back to the main bios and reflashing. Since then the onboard nic doesn't work under either bios. I am currently using a card I picked up to get it back online but I was wondering if anyone had any idea what I did or how to get it working again? Right now when I plug a cable into it either port lights up and no OS I installed sees it or even lists it as being there. I think I may have messed it up during the reflash but not sure how, and yes it is set to on in the bios. 

rjohnson11
Have you tried reinstalling the ethernet drivers?

It's a debian based system. But I did have it recheck for hardware and only the card I added came up after I grepped the output. 

Cool GTX
OK, sorry kind of basic - but I'll ask
 
is the NIC on in BIOS?
 
Fast Boot Off in BIOS?
 
CSM off ?
 
did you save default BIOS settings --> before you flashed BIOS - no idea why, but it can make a difference in how the "bios populates"
 
have you tried a True cold boot? ---> unplug PC & anything connected to PC with a wall plug.  Then hold start button 20-30 sec. to discharge capacitors, plug in & reboot
 
 
Going back to the unchanged BIOS -- it should only take a "cold" reboot, after changing BIOS switch -- odd for the NIC chip on MB to be missing on second BIOS if you only flashed 1 BIOS

Yes
Yes
Yes
 
No, I manually re-set it back up after the flash.
Yes, a few times with no change. I am not 100% sure it is the bios but give that both bios do not report the nic once the system is up makes me worry and I am not sure how I could have killed the nic. But yeah the second bios is still the stock one that came with the board and bios one is the updated one.

Windows update is also not showing anything?