Comment 1 for bug 116267

I can confirm this bug. Lately I've been working with a fully up-to-date install of Feisty 7.04. I've been trying to get the ubuntu-xen-desktop package to work. Working with a Dell Inspiron 5100 series laptop. The b44 driver works just fine under the standard ubuntu kernel but fails under both the xen desktop and server kernels.

Here are some other websites detailing this same issue in other distros, particularly Red Hat / Fedora as mentioned above.

http://www.felix-schwarz.name/Linux_on_Dell_E521_(en)#Ethernet_.28solved.29
http://www.linuxquestions.org/questions/showthread.php?t=550084

This is the par

[root@localhost ~]# dmesg |grep b44
b44.c:v1.01 (Jun 16, 2006)
b44 0000:03:00.0: No usable DMA configuration, aborting.
b44: probe of 0000:03:00.0 failed with error -5

Attention to this would be greatly appreciated since this leaves pretty much all Dell users (especially laptops) at a loss for being able to use Xen.