Intel e1000 fails after RAM upgrade

[Carsten Otto <c-otto@gmx.de>]

Hi there!

First the basic system specs:
Athlon64 3500+ S939, Winchester
Kernel 2.6.14.4, X86_64
4*1 GB RAM DDR 333, Dual Channel [before: 2*1 GB RAM DDR 400, Dual Channel]
Intel Gigabit PCI (Intel Corporation 82540EM Gigabit Ethernet Controller (rev 02))
Abit AV8

After upgrading the memory to 4 GB I noticed my e1000 did not work.
dmesg shows:

e1000: eth0: e1000_watchdog_task: NIC Link is Up 1000 Mbps Full Duplex
e1000: eth0: e1000_clean_tx_irq: Detected Tx Unit Hang
  TDH                  <2000>
  TDT                  <2000>
  next_to_use          <6>
  next_to_clean        <0>
buffer_info[next_to_clean]
  dma                  <13024c002>
  time_stamp           <ffffd8c7>
  next_to_watch        <0>
  jiffies              <ffffe096>
  next_to_watch.status <0>
e1000: eth0: e1000_clean_tx_irq: Detected Tx Unit Hang
  TDH                  <2000>
  TDT                  <2000>
  next_to_use          <6>
  next_to_clean        <0>
buffer_info[next_to_clean]
  dma                  <13024c002>
  time_stamp           <ffffd8c7>
  next_to_watch        <0>
  jiffies              <ffffe28a>
  next_to_watch.status <0>
eth0: no IPv6 routers present
e1000: eth0: e1000_clean_tx_irq: Detected Tx Unit Hang
  TDH                  <2000>
  TDT                  <2000>
  next_to_use          <6>
  next_to_clean        <0>
buffer_info[next_to_clean]
  dma                  <13024c002>
  time_stamp           <ffffd8c7>
  next_to_watch        <0>
  jiffies              <ffffe47e>
  next_to_watch.status <0>
e1000: eth0: e1000_clean_tx_irq: Detected Tx Unit Hang
  TDH                  <2000>
  TDT                  <2000>
  next_to_use          <6>
  next_to_clean        <0>
buffer_info[next_to_clean]
  dma                  <13024c002>
  time_stamp           <ffffd8c7>
  next_to_watch        <0>
  jiffies              <ffffe672>
  next_to_watch.status <0>

ethtool -t eth0 offline:
The test result is FAIL
The test extra info:
Register test  (offline)         40
Eeprom test    (offline)         0
Interrupt test (offline)         4
Loopback test  (offline)         13
Link test   (on/offline)         1

I have two of these cards. Both run fine in my (old, 32bit) server. I
tested with both cards with both systems. Only in my 64bit machine this
error occurs - with both cards.

Please tell me what to do. I have to live with the VIA onboard in the
meantime and that is not the best network card...

Thanks a lot,
-- 
Carsten Otto
c-otto@gmx.de
www.c-otto.de

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