I have a new Foxconn 755A01-6EKRS motherboard which claims to have a 10/100/1000 Fast Gigabit Ethernet port from Realtek in it. However Linux (Fedora Core 4 and Gentoo Live CD 2004.3) only sees it as a 10/100.
 
The chipset is RTL8100B/8139D and the driver module I am using under FedoraCore4 is 8139too version 0.9.27
 
 
 
[root@stross ~]# ethtool eth0
Settings for eth0:
Supported ports: [ TP MII ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
Advertised auto-negotiation: Yes
Speed: 100Mb/s
Duplex: Full
Port: MII
PHYAD: 32
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: pumbg
Wake-on: d
Current message level: 0x00000007 (7)
Link detected: yes
 
(I am plugging it in to an ethernet switch which is correctly identifying a different machine as having Gigabit NIC )
 
Is there any way I can identify whether the NIC itself *can* do Gigabit and determine that it is a driver problem, or negotiating problem, or alternatively is the marketing info wrong and this wont do Gigabit.