Network (wired) fails when sending large files

[Marcel]

Hello,

when sending larger amounts of data (SCP, NFS, printjobs), the wired network produces errors. SCP fails with "Corrupted MAC on input", NFS just stops tranfering. The network card in question is a Broadcom BCM5906M build into a S10e Lenovo netbook using the "tg3" kernel module.

I've tested this on 2 different S10e netbooks, on different networks, to rule out a broken network card or network equipment. Sending the same files over the wireless interface works, and incoming traffic is also no problem.

The MTU is set to 1500 (ethernet standard), which works on every other machine in the same network.

When lowering the MTU (e.g. to 1000) the network card works without problems, so I suspect the network driver has problems with sending large packets.

This bug is send via the ubuntu-bug utility filed agains the kernel, so I hope every neccesary information was automaticly attaced.

P.S.:

- A friend running 10.04 beta on the same hardware also has this problem.
- Bug #372685 is similar to this one (but old and incomplete?).

EDIT: corrected typos and deleted unrelated (alsa, usb, wifi) attachments

ProblemType: Bug

Date: Mon Mar 22 19:17:28 2010
DistroRelease: Ubuntu 9.10
MachineType: LENOVO 40682TG
NonfreeKernelModules: wl
Package: linux-image-2.6.31-20-generic 2.6.31-20.58
ProcCmdLine: BOOT_IMAGE=/usernameot/vmlinuz-2.6.31-20-generic root=UUID=797e6df6-91fd-418b-9f31-f731e719d890 ro quiet splash
ProcEnviron:
 LANG=en_US.UTF-8
 SHELL=/bin/bash
ProcVersionSignature: Ubuntu 2.6.31-20.58-generic
RelatedPackageVersions:
 linux-backports-modules-2.6.31-20-generic N/A
 linux-firmware 1.26
RfKill:
 0: hci0: Bluetooth
  Soft blocked: no
  Hard blocked: no
SourcePackage: linux
Tags: ubuntu-unr
Uname: Linux 2.6.31-20-generic i686
UserAsoundrc:

dmi.bios.date: 10/15/2009
dmi.bios.vendor: LENOVO
dmi.bios.version: 14CN96WW
dmi.board.name: Kuril
dmi.board.vendor: Lenovo
dmi.board.version: Rev 1.0
dmi.chassis.asset.tag: No Asset Tag
dmi.chassis.type: 10
dmi.chassis.vendor: Lenovo
dmi.chassis.version: Rev 1.0
dmi.modalias: dmi:bvnLENOVO:bvr14CN96WW:bd10/15/2009:svnLENOVO:pn40682TG:pvrLenovo:rvnLenovo:rnKuril:rvrRev1.0:cvnLenovo:ct10:cvrRev1.0:
dmi.product.name: 40682TG
dmi.product.version: Lenovo
dmi.sys.vendor: LENOVO