I've got the same problem, on a Dell Latitude X1.

01:00.0 Ethernet controller: Broadcom Corporation NetXtreme BCM5751 Gigabit 
Ethernet PCI Express (rev 01)
        Subsystem: Dell Unknown device 01a3
        Flags: bus master, fast devsel, latency 0, IRQ 16
        Memory at dfdf0000 (64-bit, non-prefetchable) [size=64K]
        Capabilities: [48] Power Management version 2
        Capabilities: [50] Vital Product Data
        Capabilities: [58] Message Signalled Interrupts: Mask- 64bit+ Queue=0/3 
Enable-
        Capabilities: [d0] Express Endpoint IRQ 0

02:03.0 Network controller: Intel Corporation PRO/Wireless 2200BG Network 
Connection (rev 05)
        Subsystem: Intel Corporation Unknown device 2721
        Flags: bus master, medium devsel, latency 64, IRQ 18
        Memory at dfcff000 (32-bit, non-prefetchable) [size=4K]
        Capabilities: [dc] Power Management version 2

Probably as a side effect of this, there are no routes after suspend (no
network) - see bug #155432.

-- 
NetworkManager causes high CPU-usage after suspend 
https://bugs.launchpad.net/bugs/154254
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