Message-ID: <463B7AA7.9050302@intel.com>
Date: Fri, 04 May 2007 11:25:43 -0700
From: "Kok, Auke" <auke-jan.h.kok@intel.com>
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To: Michel Lespinasse <walken@zoy.org>
CC: "Kok, Auke" <auke-jan.h.kok@intel.com>, Chuck Ebbert <cebbert@redhat.com>,
       linux-kernel@vger.kernel.org, Dave Jones <davej@redhat.com>,
       Jeb Cramer <cramerj@intel.com>, John Ronciak <john.ronciak@intel.com>,
       Jesse Brandeburg <jesse.brandeburg@intel.com>,
       Jeff Kirsher <jeffrey.t.kirsher@intel.com>
Subject: Re: e1000 issue on DQ965GF board (was 24 lost ticks with 2.6.20.10
 kernel)
References: <20070501130715.GB29131@zoy.org> <46375E04.5030506@redhat.com> <20070501214912.GA4048@zoy.org> <4637BA70.8000108@intel.com> <20070502084146.GA6089@zoy.org> <4638D51C.7010603@intel.com> <20070503062701.GA22255@zoy.org>
In-Reply-To: <20070503062701.GA22255@zoy.org>
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Michel Lespinasse wrote:
> On Wed, May 02, 2007 at 11:14:52AM -0700, Kok, Auke wrote:
>> I just checked and the fix I was referring to earlier didn't make it into 
>> 2.6.21-final. You can get 2.6.21-git1 from kernel.org which has the fix. See
>>
>> http://www.kernel.org/pub/linux/kernel/v2.6/snapshots/patch-2.6.21-git1.log
> 
> Good. So I tried that patch (well, actually only the change visible at
> http://lkml.org/lkml/2007/3/6/268). I patched it into a 2.6.20.11 kernel,
> using the same config file as previously. The good news is that this fixes
> my issue: there are no lost ticks anymore, and the link does negotiate a
> gigabit connection. This is a great improvement for me :)
> 
> I still seem to hit an issue if using the ethtool command, though.
> when using 'ethtool -s eth0 autoneg on', the link comes up at gigabit speed,
> but a couple seconds later is comes down again, and then up at 100 megabits:
> 
> e1000: eth0: e1000_watchdog: NIC Link is Up 1000 Mbps Full Duplex
> e1000: eth0: e1000_watchdog: NIC Link is Down
> e1000: eth0: e1000_watchdog: NIC Link is Up 100 Mbps Full Duplex
> e1000: eth0: e1000_watchdog: 10/100 speed: disabling TSO
> 
> The same thing happens if I use ifdown eth0; ifup eth0 too. Once again,
> I only observe this on my DQ965GF motherboard, the DG965RY board is fine
> (stays at gigabit speed when I issue these commands).
> 
> Is this something you could easily reproduce at Intel or would you want me
> to look into that issue on my system ?

can you try turning off the "management enable" function in the BIOS of the 
DQ965GF? That fixes this issue for us in our labs. A fix for this is also 
available in our standalone 7.5.5.1 driver (obtainable from e1000.sf.net), but 
it hasn't made it upstream yet.

Auke
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