netdev - RE: [E1000-devel] i217-LM boot wreckage

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Date:	Thu, 20 Mar 2014 15:12:48 +0000
From:	"Ertman, DavidX M" <davidx.m.ertman@...el.com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>
CC:	"e1000-devel@...ts.sourceforge.net" 
	<e1000-devel@...ts.sourceforge.net>
Subject: RE: [E1000-devel] i217-LM boot wreckage

Hello Thomas,

Could you provide the exact kernel version and kernel config you are using?
Do you have Runtime Power Management enabled?
Have you tried the latest driver from sourceforge.net (3.0.4.1)?

>From your lspci output it looks like you have a Management Engine enabled platform.   Do you know what version of ME is loaded?  Have you checked to see that you are on the latest BIOS/NVM image (looks like a new one was released on March 11th for the M93z)?

Thanks

-----Original Message-----
From: Thomas Gleixner [mailto:tglx@...utronix.de] 
Sent: Thursday, March 20, 2014 6:45 AM
To: netdev@...r.kernel.org
Cc: e1000-devel@...ts.sourceforge.net
Subject: Re: [E1000-devel] i217-LM boot wreckage

On Thu, 20 Mar 2014, Thomas Gleixner wrote:
> So it looks like the BIOS is setting something up, when the cable is 
> plugged at power on time, which is not visible through our debug 
> output.

Some more info:

I prevented e1000e from being autoloaded and booted with the cable unplugged.

T1:
  Plug cable 
  modprobe e1000e	-> Works

T2:
  modprobe e1000e
  plug cable		-> Works not

  rmmod e1000e
  modprobe e1000e	-> works not

  unplug cable
  rmmod e1000e
  modprobe e1000e	-> works

  rmmod e1000e
  unplug cable     
  modprobe e1000e
  plug cable		-> Works not

  rmmod e1000e
  unplug cable     
  plug cable
  modprobe e1000e	-> Works not

So if the module is loaded w/o the cable plugged it does not work. If I unplug before unloading the module and then plug in before loading the module again it works again.

Thanks,

	tglx


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