linux-kernel - Re: Intel on-board NIC negotiates at 10mbps instead of 1gbps (new Intel P55KG motherboard), driver bug?

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Message-ID: <ba1f10320910130807r3f8ed8a5h543c14259d1bd1b@mail.gmail.com>
Date:	Tue, 13 Oct 2009 11:07:15 -0400
From:	Justin Piszcz <jpiszcz@...il.com>
To:	linux-kernel@...r.kernel.org
Cc:	linux-net@...r.kernel.org
Subject: Re: Intel on-board NIC negotiates at 10mbps instead of 1gbps (new 
	Intel P55KG motherboard), driver bug?

On Tue, Oct 13, 2009 at 7:46 AM, Justin Piszcz <jpiszcz@...il.com> wrote:
> Hello,
>
> I recently purchased/installed an Intel DP55KG motherboard and when I
> boot from the System Rescue CD (1.3.0) the on-board NIC only
> negotiates at 10mbps, when I plug the same cable into two other Intel
> x1 PCI-e nics, they negotiate at 1gbps without any issue.  My old
> system also negotiated at 1gbps (a DG965WH) board.
>
> I understand support for chip has recently been added to the e1000e
> driver, has this been resolved in newer kernels?
>
> I am asking as I am still running memtest etc before putting the box
> in production, thanks.
>
> From the logs:
>
> e1000e: Intel(R) PRO/1000 Network Driver - 1.0.2-k2
> e1000e: Copyright (c) 1999-2008 Intel Corporation.
> e1000e 0000:00:19.0: PCI INT A -> GSI 20 (level, low) -> IRQ 20
> e1000e 0000:00:19.0: pci_enable_pcie_error_
> reporting failed 0xfffffffb
> e1000e 0000:00:19.0: setting latency timer to 64
> e1000e 0000:00:19.0: irq 36 for MSI/MSI-X
> 0000:00:19.0: eth0: (PCI Express:2.5GB/s:Width x1) (mac address)
> 0000:00:19.0: eth0: Intel(R) PRO/1000 Network Connection
> 0000:00:19.0: eth0: MAC: 9, PHY: 9, PBA No: ffffff-0ff
>
> e1000e 0000:00:19.0: irq 36 for MSI/MSI-X
> e1000e 0000:00:19.0: irq 36 for MSI/MSI-X
> ADDRCONF(NETDEV_UP): eth0: link is not ready
> e1000e: eth0 NIC Link is Up 10 Mbps Full Duplex, Flow Control: RX
> 0000:00:19.0: eth0: 10/100 speed: disabling TSO
> ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready
> eth0: no IPv6 routers present
>
> Please cc as I am not on the lists, thanks.
>
> (resent as plain-text)
>
> Justin.
>


I spoke with Intel, they said they do not support Linux :-P

"However, Linux* has not been tested on this desktop board and we do
not offer any drivers for that operating system."

-- Can someone from Intel on the list (or linux-net) comment on this?
If the problem still occurs with the latest 2.6.31-rcX, I should try
and/or use the latest e1000e driver from here:
http://sourceforge.net/projects/e1000/ -- aside from that, are there
any other workarounds (if the problem persists)?

I have used the same cable with 3 different NICs (two x1 PCI-e) and
the last system I had was PCI-e (on-board) all negotiated 1gbps, this
one though only negotiates at 10mbps duplex.

Is this a known bug?

Justin.
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