When plugging the cable into the wall plug instead of the Linksys SD2005
the dmesg command shows that the same unchanged driver is in fact
capable to do 1000MB:
>From the freshly compiled 8.0.19 driver issued by intel which is loaded
by "modprobe e1000 AutoNeg=0x28" as suggested earlier:
Command:"ethtool eth0"
Settings for eth0:
Supported ports: [ TP ]
Supported link modes: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full
1000baseT/Full
Supports auto-negotiation: Yes
Advertised link modes: 100baseT/Full
1000baseT/Full
Advertised pause frame use: No
Advertised auto-negotiation: Yes
Link partner advertised link modes: Not reported
Link partner advertised pause frame use: No
Link partner advertised auto-negotiation: No
Speed: 100Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
MDI-X: Unknown
Supports Wake-on: umbg
Wake-on: g
Current message level: 0x00000007 (7)
Link detected: yes
Command: "ethtool -i eth0"
driver: e1000
version: 8.0.19-NAPI
firmware-version: N/A
bus-info: 0000:05:00.0
Plugged into the SD2005 switch:
[32234.423251] e1000: eth0: e1000_watchdog_task: NIC Link is Down
[32243.193686] e1000: eth0: e1000_watchdog_task: NIC Link is Up 100 Mbps Full
Duplex, Flow Control: RX/TX
Plugged into the wall plug:
[33467.172950] e1000: eth0: e1000_watchdog_task: NIC Link is Down
[33478.655021] e1000: eth0: e1000_watchdog_task: NIC Link is Up 1000 Mbps Full
Duplex, Flow Control: RX/TX
And back to the switch again:
[33547.942638] e1000: eth0: e1000_watchdog_task: NIC Link is Down
[33563.045981] e1000: eth0: e1000_watchdog_task: NIC Link is Up 100 Mbps Full
Duplex, Flow Control: RX/TX
Smells a bit like some issues in the speed negotiation between the NIC
and the switch - most probably in "e1000_phy.c". Will dig some more into
that.
--
Intel Gibabit Ethernet NIC (82541PI) operating at 100Mbps instead of 1000Mbps
after upgrading to Hardy
https://bugs.launchpad.net/bugs/309211
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