netdev - RE: [E1000-devel] WoL stopped working after power off with 2.6.38 (e1000e specific?)

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Message-ID: <8DD2590731AB5D4C9DBF71A877482A9001B54CE017@orsmsx509.amr.corp.intel.com>
Date:	Mon, 2 May 2011 15:02:05 -0700
From:	"Allan, Bruce W" <bruce.w.allan@...el.com>
To:	Kamil Iskra <kamil@...ra.name>,
	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"e1000-devel@...ts.sourceforge.net" 
	<e1000-devel@...ts.sourceforge.net>
CC:	"linux-pm@...ts.linux-foundation.org" 
	<linux-pm@...ts.linux-foundation.org>
Subject: RE: [E1000-devel] WoL stopped working after power off with 2.6.38
	(e1000e specific?)

>-----Original Message-----
>From: Kamil Iskra [mailto:kamil@...ra.name]
>Sent: Friday, April 29, 2011 10:45 PM
>To: netdev@...r.kernel.org; e1000-devel@...ts.sourceforge.net
>Subject: [E1000-devel] WoL stopped working after power off with 2.6.38 (e1000e
>specific?)
>
>[ Note: I'm not on these mailing lists, so be sure to Cc: me if you want
>more info from me ]
>
>After upgrading from kernel 2.6.37 to 2.6.38, Wake on LAN after shutdown
>stopped working for me on both of my Thinkpad laptops.  Both systems use
>the e1000e driver.  One (a T61) has an 82566MM NIC, the other (an X201) an
>82577LM.  I'm running 64-bit Gentoo Linux with a custom compiled kernel.
>The network driver is built into the kernel.
>
>Wake on LAN still works after suspend (S3), but not after a complete
>shutdown (with power supply connected).
>
>I figured the updated e1000e driver in 2.6.38 was probably to blame,
>however, after I copied the whole drivers/net/e1000e directory from the
>2.6.37 over to the 2.6.38 tree and recompiled, the problem persisted, so I
>don't know anymore.
>
>I modified the system shutdown sequence to invoke ifconfig and ethtool
>right before the final halt.  According to ifconfig, eth0 is down at that
>point.  According to ethtool, WoL is configured correctly ("Wake-on: g").
>There is, however, a difference in the output of ethtool between the two
>kernel versions.  "Link detected:" shows "yes" with 2.6.37, but "no" with
>2.6.38.
>
>A workaround that I found to work was to invoke "ifconfig eth0 up" right
>before the halt.
>
>Any suggestions?  Is this new behavior expected or is it a bug?

WoL from S5 "works for me"(TM) using the e1000e driver on RHEL6 and 2.6.38.
Could you provide your customer kernel configuration?

Cc: linux-pm@...ts.linux-foundation.org

Thanks,
Bruce.
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