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Date:	Mon, 16 Apr 2007 10:04:33 -0700
From:	"Tantilov, Emil S" <emil.s.tantilov@...el.com>
To:	"Dave Jones" <davej@...hat.com>, <netdev@...r.kernel.org>
Subject: RE: 2.6.21rc7 e1000 media-detect oddness.

Dave Jones wrote:
> I booted up 2.6.21rc7 without an ethernet cable plugged in,
> and noticed this..
> 
> e1000: 0000:02:00.0: e1000_probe: The EEPROM Checksum Is Not Valid
> e1000: probe of 0000:02:00.0 failed with error -5
> 
> I plugged a cable in, did rmmod e1000;modprobe e1000, and got this..
> 
> e1000: 0000:02:00.0: e1000_probe: (PCI Express:2.5Gb/s:Width x1)
> 00:16:d3:3a:62:d3 e1000: eth0: e1000_probe: Intel(R) PRO/1000 Network
> Connection 
> e1000: eth0: e1000_watchdog: NIC Link is Up 100 Mbps Full Duplex,
> Flow Control: RX e1000: eth0: e1000_watchdog: 10/100 speed: disabling
> TSO 
> 
> and it works fine..
> Why would no cable make it think the EEPROM is invalid ?

There was a similar issue reported a while back on T60 and it had to do
with power management:
http://forums.gentoo.org/viewtopic-t-476305-highlight-e1000.html

Some questions:
What was the system in your case (lspci -vv)? 

> 
> I repeated this a few times, just to be sure it wasn't a fluke, and it
> seems to happen 100% reproducably.

Can you reproduce this with the latest driver from e1000.sf.net?

Thanks,
Emil
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