netdev - r8169 chips on some Intel D945GSEJT boards fail to work after PXE boot

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Message-ID: <4ABA535E.2010801@onelan.com>
Date:	Wed, 23 Sep 2009 17:57:02 +0100
From:	Simon Farnsworth <simon.farnsworth@...lan.com>
To:	Francois Romieu <romieu@...zoreil.com>
CC:	netdev@...r.kernel.org
Subject: r8169 chips on some Intel D945GSEJT boards fail to work after PXE
 boot

Hello,

I'm having trouble getting Intel D945GSEJT boards to reliably install
via PXE boot. They all have apparently identical r8169 chips, and I'm
using the r8169 driver from Fedora's 2.6.30-1 kernel; I've also tried
porting the changes in r8169.c from Linus's git
85910a8e9f425656bb7202d0fc62800000ffa262 to the kernel I'm using,
without success.

Some boards are good, and just work, whether I boot via PXE or boot from
the local disk; dmesg.working and lspci.working are from a good board.

Some boards are bad; they work fine if I boot from local disk (including
network), but the kernel cannot detect link, or send or receive data if
I PXE boot. dmesg.broken and lspci.broken are from a bad board.

I've tried disabling MSI, in case it's an interrupt issue, which hasn't
helped; unfortunately, the pungi-generated initramfs for PXE boot
doesn't have a shell I can use to interrogate the kernel.

I've updated them to the current BIOS revision,
JT94510H.86A.0037.2009.0820.1551, which hasn't helped. I'm happy to try
any suggestions, or to provide more information if needed.
-- 
Simon Farnsworth

View attachment "dmesg.broken" of type "text/plain" (30364 bytes)

View attachment "dmesg.working" of type "text/plain" (31041 bytes)

View attachment "lspci.broken" of type "text/plain" (20934 bytes)

View attachment "lspci.working" of type "text/plain" (20934 bytes)