Update... I did 2 tests : 1) booted with option acpi=off It booted correctly, i managed to get some load on one of the card and after a while (10 minutes i guess) the Timeout occurs. Side effect, at the same moment the sata contolers lost control of the disks somehow and the raid 5 array on the system crashed hard. I have no traces as i was unable to rebuild it (and i tried a lot of extreme voodoo methods). 2) changed the 3com cards i replaced by two cards, 01:06.0 Ethernet controller: VIA Technologies, Inc. VT6102 [Rhine-II] (rev 42) 01:07.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL-8029(AS) reinstalled and stressed the network (small download from a laptop) and : Jun 29 09:34:10 loki kernel: NETDEV WATCHDOG: eth0: transmit timed out Jun 29 09:34:51 loki last message repeated 14 times Jun 29 09:35:18 loki last message repeated 8 times so it seems to be a more generic problem. (i'v updated the fedora bugzilla aswell) did not test the "[PATCH] 8139cp dev->tx_timeout" yet. JB > On Tue, Jun 26, 2007 at 04:24:07PM +0200, Jean-Baptiste Vignaud wrote: > > Hello, i have a very similar problem with 2.6.21 also; > > > > 2 3com NICs and they are failling randomly. > > > > The kernel is a basic fedora 7 kernel (2.6.21-1.3228.fc7) > > I found a bug report and added details here : https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=243960 > > > > I'm not subcribed on this list, so please cc me if there is any questions. > > > > JB > > > > > On Tue, Jun 26, 2007 at 08:10:17AM +0200, Marcin Ślusarz wrote: > > > ... > > > > I reproduced it on minimal config: > ... > > > We know your hardware should be OK - since it was fine with 2.6.20. > ... > > It looks like there is something common in the air... > > Marcin: ne2k_pci with 8390, Jean: 3com, and now I see > similar problem with 8139cp too (plus some ideas): > > http://marc.info/?l=linux-netdev&m=118293314109648&w=2 > > So, you probably should wait a little & look for new patches here. > > Cheers, > Jarek P. > - To unsubscribe from this list: send the line "unsubscribe linux-net" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html