BT 5 R3 hangs on login if network not connected

Backtrack 5 R3 KDE 32bit, installed on multi boot laptop with win7, Ubuntu 10.10 and Backtrack 5 R3. I am using the implementation of grub built in to Ubuntu 10.10 to boot all three operating systems. The hardware is an Acer aspire 4250. The hang occures during Backtrack startup. I select bactrack from the grub minu, it boots, I see the splash screen ( the more you hear etc), then screen goes back to scrolling text until login appears. At this point, if I let the system sit for about 15 seconds it hangs. If I try to log in, it hangs. If I connect the laptop to the internet with a cat5 in the RJ45 socket, or if I just plug the system into an unused Cisco switch, Backtrak boots and runs normally. I think the problem is connected to the wired network drivers. Does anyone have a clue?

BTW – BT 5 R3 is the only OS that manifests this behavior. My enchant Ubuntu distro and my game boot loader (microsoft windows) both boot and run without a problem.

Network hardware info:
*-network
description: Ethernet interface
product: AR8152 v2.0 Fast Ethernet
vendor: Atheros Communications
physical id: 0
bus info: pci@0000:02:00.0
logical name: eth0
version: c1
serial: e8:9a:8f:31:0d:fb
capacity: 100MB/s
width: 64 bits
clock: 33MHz
capabilities: pm msi pciexpress vpd bus_master cap_list ethernet physical tp 10bt 10bt-fd 100bt 100bt-fd autonegotiation
configuration: autonegotiation=on broadcast=yes driver=atl1c driverversion=1.0.0.2-NAPI firmware=N/A latency=0 link=no multicast=yes port=twisted pair
resources: irq:42 memory:f0200000-f023ffff ioport:2000(size=128)

How did you installed the multiboot? The order..Ex. first W7, then BT5 and then Ubuntu...Did you use ext4 file system for BT5?...Are you using the same swap partition for the linux distros?

Win 7 was installed first, then Ubuntu 10.10 was installed, BT 5 was installed last. Once BT was up and running, I reinstalled the boot block with Ubuntu version of grub. Same swap is used for both Linux systems. Both Linux systems are using ext4. Do you think the common swap could be the problem?