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New: e1000/e1000e driver doesn't work with gigabit connection

Bugme-new Andrew Morton 2 participants 2 messages Jun 26, 2008 1 message not in the archive

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A message that is not in the archive (sent off-list or not yet received): [email protected]/

Andrew Morton

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#1 lore raw

(switched to email. Please respond via emailed reply-to-all, not via the bugzilla web interface).

Quoted 100 lines · On Thu, 26 Jun 2008 11:49:14 -0700 (PDT) [email protected] wrote:

http://bugzilla.kernel.org/show_bug.cgi?id=10990

           Summary: e1000/e1000e driver doesn't work with gigabit connection
           Product: Drivers
           Version: 2.5
     KernelVersion: 2.6.25.6-55.fc9.i686
          Platform: All
        OS/Version: Linux
              Tree: Mainline
            Status: NEW
          Severity: normal
          Priority: P1
         Component: Network
        AssignedTo: [email protected]
        ReportedBy: [email protected]

Linux lyra 2.6.25.6-55.fc9.i686 #1 SMP Tue Jun 10 16:27:49 EDT 2008 i686 i686 i386 GNU/Linux

I have a multiple HP DC7700s with integrated Intel ethernet adapters. They work when the network cable is plugged into a 10/100 port on a switch. They do not work when plugged into a 10/100/1000 port. I also have DC7700s with integrated Broadcom chips (tg3 driver) and they work fine.

Quoted 1 line

From dmesg:

e1000e: Intel(R) PRO/1000 Network Driver - 0.2.0
e1000e: Copyright (c) 1999-2007 Intel Corporation.
...
eth0: (PCI Express:2.5GB/s:Width x1) 00:0f:fe:4a:68:37
eth0: Intel(R) PRO/1000 Network Connection
eth0: MAC: 4, PHY: 6, PBA No: 1002ff-0ff

When plugged into a 10/100/1000 porting, forcing:
ethtool -s eth0 autoneg off speed 1000 duplex full

results in erratic (some pings work) or dead operation (no pings work).

Using:
ethtool -s eth0 autoneg off speed 100 duplex full

seems to work OK.

Returning it to autoneg results in erratic/dead operation:

[root@lyra ~]# ethtool -s eth0 autoneg on
[root@lyra ~]# 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: 10baseT/Half 10baseT/Full
100baseT/Half 100baseT/Full 1000baseT/Full
Advertised auto-negotiation: Yes
Speed: 1000Mb/s
Duplex: Full
Port: Twisted Pair
PHYAD: 1
Transceiver: internal
Auto-negotiation: on
Supports Wake-on: pumbag
Wake-on: g
Current message level: 0x00000001 (1)
Link detected: yes
[root@lyra ~]# ping server2
PING server2.domain.avtechpulse.com (192.168.0.3) 56(84) bytes of data. 64 bytes from server2.domain.avtechpulse.com (192.168.0.3): icmp_seq=1 ttl=64 time=0.079 ms
64 bytes from server2.domain.avtechpulse.com (192.168.0.3): icmp_seq=2 ttl=64 time=0.158 ms
64 bytes from server2.domain.avtechpulse.com (192.168.0.3): icmp_seq=7 ttl=64 time=0.161 ms
64 bytes from server2.domain.avtechpulse.com (192.168.0.3): icmp_seq=11 ttl=64 time=0.113 ms
64 bytes from server2.domain.avtechpulse.com (192.168.0.3): icmp_seq=12 ttl=64 time=0.131 ms
64 bytes from server2.domain.avtechpulse.com (192.168.0.3): icmp_seq=17 ttl=64 time=0.127 ms
^C
--- server2.domain.avtechpulse.com ping statistics ---
18 packets transmitted, 6 received, 66% packet loss, time 17553ms rtt min/avg/max/mdev = 0.079/0.128/0.161/0.028 ms
[root@lyra ~]#

This was confirmed with multiple 10/100/1000 switches from different manufacturers.

[root@lyra ~]# more /etc/modprobe.conf
alias eth0 e1000e #same behaviour with "e1000"
alias scsi_hostadapter libata
alias scsi_hostadapter1 ata_piix
alias snd-card-0 snd-hda-intel
options snd-card-0 index=0
options snd-hda-intel index=0

Quoted 4 lines

Need any additional data?

- Mike

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#2 lore raw
Quoted 3 lines
Quoted 3 lines

When plugged into a 10/100/1000 porting, forcing:
ethtool -s eth0 autoneg off speed 1000 duplex full

gigabit requires autonegotiation, and if you force speeds you would have to force it on both ends anyway. The above configuration is therefore not a valid configuration.

I suggest changing the autonegotiation mask, which leaves autoneg enabled:

	ethtool -s eth0 advertise 0x20

this is supported and should accomplish what you want.

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