Re: [Bugme-new] [Bug 10990] New: e1000/e1000e driver doesn't work with gigabit connection

Re: [Bugme-new] [Bug 10990] New: e1000/e1000e driver doesn't work with gigabit connection

[Andrew Morton]

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

On Thu, 26 Jun 2008 11:49:14 -0700 (PDT)
bugme-daemon@bugzilla.kernel.org 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: jgarzik@pobox.com
>         ReportedBy: mjc@avtechpulse.com
> 
> 
> 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.
> 
> >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
> 
> 
> Need any additional data?
> 
> - Mike
> 


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Re: [Bugme-new] [Bug 10990] New: e1000/e1000e driver doesn't work with gigabit connection

[Kok, Auke]

>> 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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