From mboxrd@z Thu Jan 1 00:00:00 1970 From: David Greaves Subject: 2.6.6 e1000 NETDEV WATCHDOG: eth0: transmit timed out Date: Mon, 14 Jun 2004 17:47:08 +0100 Sender: netdev-bounce@oss.sgi.com Message-ID: <40CDD68C.8070509@dgreaves.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Cc: netdev@oss.sgi.com Return-path: To: shemminger@osdl.org, scott.feldman@intel.com Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org Hi I have 2 machines with Intel/Pro 1000MT cards. One machine seems to work fine (AFAIK), the other has major problems. I've swapped the cards and the problem stays on the machine. I'm using version 5.2.39-k2 from the stock 2.6.6 kernel on both machines. Any sustained traffic causes repeated: Jun 14 16:29:14 ash kernel: NETDEV WATCHDOG: eth0: transmit timed out Jun 14 16:29:17 ash kernel: e1000: eth0 NIC Link is Up 1000 Mbps Full Duplex Jun 14 16:29:17 ash kernel: nfs: server cu OK I had a pair of Realtek r8169s that worked fine but only gave me 10Mb/s so I exchanged them for the Intel/Pro cards in the hope of something better - now, even with scp's rate limiter as low as 10kb/s this it still occurs. I have played with all the module parameters and not found anything that affects it at 1Gbps Even dropping to 100Mbps: Jun 14 17:33:03 ash kernel: e1000: eth0 NIC Link is Up 100 Mbps Full Duplex Jun 14 17:33:33 ash kernel: NETDEV WATCHDOG: eth0: transmit timed out it can do 10Mbs: scp reports a throughput of 1.0Mb/s (... less than thrilling) however scp now transfers a few Mb and says: Disconnecting: Corrupted MAC on input. I found this mail: http://oss.sgi.com/projects/netdev/archive/2004-06/msg00256.html from Stephen which appears to reverse this mail: http://marc.theaimsgroup.com/?l=linux-kernel&m=107516205706542&w=2 from Scott which I gather was supposed to correct this problem :) I have seen no suggestions about other subsystems (eg ACPI etc) that could also be tried. David