Comment 3 for bug 236268

I can confirm this problem.
I'm running kernel 2.6.24-19-xen on Ubuntu 8.04, and have got two Intel 82575EB nic's, which just don't work.
According to ifconfig, ip link show, brctl show and so on, everything seems to be fine. But there is just no traffic going through the interfaces.
With the standard (no-xen) kernel, everything works fine.

I've got four brand new servers, which should become xen hosts, and can't use them right now. A quick fix would be really, really appreciated.