The motherboard is Gigabyte Z68A-D3H-B3 (with latest EFI).

The LAN chip is Realtek RTL8111E.

When I was using this a Win SBS2011, it worked fine with gigabit connection. (and will verify as my SBS disk is still intact)

Nothing changed physically. (I did try and swapped with known gigabit port)

 

How can I force this to work gigabit?

Can it be a linux driver issue?

 

This is a pretty serious issue. I have already started migration (migrating 9 data disks from NTFS and pushing into array one by one, installing various docker and VMs), which possibly I wouldn't, if I had noticed this.
How can I help you, help me?

 

Edited October 20, 20196 yr by NLS

Bad cable, bad connection is the usual cause of this.

I will verify with the cable. Port I already swapped.

Again note, this works fine in Win SBS2011 (but as I said will verify again).

 

This definitely looks like something with the OS.

 

OK newer news.

Verified cable (used cable and port from known working gigabit machine).

Also my SBS2011 doesn't boot, so I cannot verify OS issues.

 

Seems, that my on-board LAN card is dead (although reports no error in Windows or Linux) and I had (in the past and don't even remember it) installed a PCI LAN card.

The card reports as eth0 in unRAID and reports as "8139too".

The on-board reports as eth1 (with interface down) and model "r8169".

 

This "8139too" works ok in unRAID?

 

Post your diagnostics

Diagnostics attached.

 

Will replace the card with a PCIe in any case (since using a PCI one doesn't feel ok anyway).

This works I hope: TP-Link TG-3468

 

quasar-ultima-diagnostics-20191020-2127.zip

I got the card, unRAID doesn't see it.

See here:

 

I have a similar board, not for Unraid, and every once in a while the onboard nic would stop working.  I had to shut down, unplug power, hold power button for good measure, then power back up.  Could be worth a shot.